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*''WesternAnimation/TheBackyardigans'' was originally going to have more episodes after Season 4, but was cancelled due to the show's creator Janice Burgess moving on to work on the revival for ''WesternAnimation/WinxClub''.
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* ''WesternAnimation/{{WITCH}}'' got ScrewedByTheNetwork and ended after just two seasons, with the series finale introducing a new character and setting up future stories.
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* ''WesternAnimation/{{WITCH}}'' got ScrewedByTheNetwork and ended after just two seasons, with the series finale introducing a new character and setting up future stories.an adaptation of [[ComicBook/{{WITCH}} the comic series]]' next story arc.
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* ''[[WesternAnimation/{{Pibby}} Learning With Pibby]]'' ended with clear plans for a TV series, with several plotlines unresolved and the Darkness still on the loose. In spite of the hullaboo surrounding the short and subsequent promotion by Creator/AdultSwim, [[https://www.instagram.com/p/Cx8hRaRPaMr/?igshid=MzRlODBiNWFlZA== the creator later said the show hadn't been picked up and likely wouldn't ever be]].
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* ''[[WesternAnimation/{{Pibby}} Learning With Pibby]]'' ended with clear plans for a TV series, with several plotlines unresolved unresolved, many questions unanswered and the Darkness still on the loose. In spite of the hullaboo hullabaloo surrounding the short and subsequent promotion by Creator/AdultSwim, [[https://www.instagram.com/p/Cx8hRaRPaMr/?igshid=MzRlODBiNWFlZA== the creator later said the show hadn't been picked up and likely wouldn't ever be]].
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* ''[[WesternAnimation/{{Pibby}} Learning with Pibby]]'' ended with clear plans for a TV series, with several plotlines unresolved and the Darkness still on the loose. In spite of the hullaboo surrounding the short and subsequent promotion by Creator/AdultSwim, [[https://www.instagram.com/p/Cx8hRaRPaMr/?igshid=MzRlODBiNWFlZA== the creator later said the show ended up not being picked up]].
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* ''[[WesternAnimation/{{Pibby}} Learning with With Pibby]]'' ended with clear plans for a TV series, with several plotlines unresolved and the Darkness still on the loose. In spite of the hullaboo surrounding the short and subsequent promotion by Creator/AdultSwim, [[https://www.instagram.com/p/Cx8hRaRPaMr/?igshid=MzRlODBiNWFlZA== the creator later said the show ended up not being hadn't been picked up]].up and likely wouldn't ever be]].
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* ''[[WesternAnimation/{{Pibby}} Learning with Pibby]]'' ended with clear plans for a TV series, with several plotlines unresolved and the Darkness still on the loose. In spite of the hullaboo surrounding the short and subsequent promotion by Creator/AdultSwim, [[https://www.instagram.com/p/Cx8hRaRPaMr/?igshid=MzRlODBiNWFlZA== the creator later said the show ended up not being picked up]].
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* ''WesternAnimation/{{WITCH}}'' ended after just two seasons, with the series finale introducing a new character and setting up future stories.
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* ''WesternAnimation/{{WITCH}}'' got ScrewedByTheNetwork and ended after just two seasons, with the series finale introducing a new character and setting up future stories.
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* ''WesternAnimation/{{WITCH}}'' ended after just two seasons, with the series finale introducing a new character and setting up future stories.
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* ''WesternAnimation/GlitchTechs'' was cancelled in the middle of production on its second production season, which was already a cut short 10 episodes, due to a change in corporate management. None of those episodes were ever finished, remaining as animatics at best, preventing the series from even re-visiting [[Myth/Polybius the "Bolypius" plotline]] that was introduced in the second episode.
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* ''WesternAnimation/GlitchTechs'' was cancelled in the middle of production on its second production season, which was already a cut short 10 episodes, due to a change in corporate management. None of those episodes were ever finished, remaining as animatics at best, preventing the series from even re-visiting [[Myth/Polybius [[Myth/{{Polybius}} the "Bolypius" plotline]] that was introduced in the second episode.
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* ''WesternAnimation/HighGuardianSpice'' has only twelve episodes (which were all released on Crunchyroll on the same day) and ends on a cliffhanger. After two years of silence regarding the show, it was later confirmed that the studio behind it had shut down, making any continuation unlikely.
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* ''WesternAnimation/GlitchTechs'' was cancelled in the middle of production on its second production season, which was already a cut short 10 episodes, due to a change in corporate management. None of those episodes were ever finished, remaining as animatics at best, preventing the series from even re-visiting [[Myth/Polybius the "Bolypius" plotline]] that was introduced in the second episode.
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* ''WesternAnimation/WanderOverYonder'' met its fate because Disney thought that 80 episodes was long enough for a series, and were going to make more money by showing re-runs on Disney XD rather than giving it a third season. Similar to other examples here, the show's main conflict was fortunately resolved, but some plot threads were still left dangling.
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* ''WesternAnimation/WanderOverYonder'' met its fate because Disney thought that 80 that, despite the show's popularity, 40 half-hours episodes was long enough for a series, the show and were going to they could make more money by showing re-runs on Disney XD rather than giving it over even entertaining the crew's pitch for a third season. Similar to other examples here, While the show's main conflict introduced in the second season was fortunately resolved, but some plot threads were still left dangling.
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** ''WesternAnimation/SonicTheHedgehogSatAM'' ended on a cliffhanger in which Dr. Robotnik appeared to have died but his increasingly dissatisfied henchman Snively has plans to usurp his place as the series' primary antagonist and revealing a threatening new foe, shown out of the darkness with menacing red eyes. Whoever this new character was, viewers never found out, as the series was abruptly cancelled due to declining ratings in favor of ''Series/MightyMorphinPowerRangers'', which was sharing the exact same time slot. Writer Ben Hurst revealed his plans for a third season where the mysterious red eyes belonged to [[spoiler:Naugus, an EvilSorcerer who Robotnik betrayed years prior]].
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** ''WesternAnimation/SonicTheHedgehogSatAM'' ended on a cliffhanger in which Dr. Robotnik appeared to have died but his increasingly dissatisfied henchman Snively has plans to usurp his place as the series' primary antagonist and revealing a threatening new foe, shown out of the darkness with menacing red eyes. Whoever this new character was, viewers never found out, as the series was abruptly cancelled due to declining ratings in favor of ''Series/MightyMorphinPowerRangers'', which was sharing the exact same time slot. Writer Ben Hurst revealed his plans for a third season where the mysterious red eyes belonged to [[spoiler:Naugus, an EvilSorcerer who Robotnik betrayed years prior]]. A movie titled ''Sonic Armageddon'' was at one point meant to have given the series a conclusion, but a combination of Ken Penders getting involved with the project and ''Anime/SonicX'' beginning at this time meant this too never saw the light of day.
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** ''WesternAnimation/SonicTheHedgehogSatAM'' ended on a cliffhanger in which Dr. Robotnik appeared to have died but his increasingly dissatisfied henchman Snively has plans to usurp his place as the series' primary antagonist and revealing a threatening new foe, shown out of the darkness with menacing red eyes. Whoever this new character was, viewers never found out, as the series was abruptly cancelled. Writer Ben Hurst revealed his plans for a third season where the mysterious red eyes belonged to [[spoiler:Naugus, an EvilSorcerer who Robotnik betrayed years prior]].
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** ''WesternAnimation/SonicTheHedgehogSatAM'' ended on a cliffhanger in which Dr. Robotnik appeared to have died but his increasingly dissatisfied henchman Snively has plans to usurp his place as the series' primary antagonist and revealing a threatening new foe, shown out of the darkness with menacing red eyes. Whoever this new character was, viewers never found out, as the series was abruptly cancelled.cancelled due to declining ratings in favor of ''Series/MightyMorphinPowerRangers'', which was sharing the exact same time slot. Writer Ben Hurst revealed his plans for a third season where the mysterious red eyes belonged to [[spoiler:Naugus, an EvilSorcerer who Robotnik betrayed years prior]].
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** ''WesternAnimation/SonicUnderground'' ended after only one season, way before Sonic and his siblings could even come close to dethroning Robotnik and finding their mother. ''ComicBook/SonicTheHedgehogArchieComics'' intended to rectify this, but the project ended up cancelled. Fans from ''all across the Internet'' have made fanmade reboots of the series, including [[https://sonicfanon.fandom.com/wiki/Category:AngieYaz_Sonic_Underground_reboot this one]].
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** ''WesternAnimation/SonicUnderground'' ended after only one season, way before Sonic and his siblings could even come close to dethroning Robotnik and finding their mother. ''ComicBook/SonicTheHedgehogArchieComics'' intended Ian Flynn wanted to rectify this, make his own conclusion to the story in ''ComicBook/SonicTheHedgehogArchieComics'', specifically in ''Sonic Universe'' #50, but the project ended up cancelled. Fans he was told that ''Sonic Underground'' was completely off limits to him. Even so, fans from ''all across the Internet'' have made fanmade reboots of the series, including [[https://sonicfanon.fandom.com/wiki/Category:AngieYaz_Sonic_Underground_reboot this one]].one]], along with a fanmade ''Sonic Universe'' #50 bringing Ian Flynn's planned epilogue to life.
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* ''WesternAnimation/ThePrince2021'' ends on a cliffhanger where Kevin gives the royal family poisoned tarts. Due to low ratings, it was quickly cancelled after only one season, and with the death of [[UsefulNotes/ElizabethII Queen Elizabeth]], it’s unlikely to ever get renewed.
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* ''WesternAnimation/ThePrince2021'' ends on a cliffhanger where Kevin gives the royal family poisoned tarts. Due to low ratings, ratings and very poor critical reception, it was quickly cancelled after only one season, and with the death of [[UsefulNotes/ElizabethII Queen Elizabeth]], it’s unlikely to ever get renewed.Elizabeth]] in 2022 only makes its renewal seem even more unlikely.
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* ''WesternAnimation/MyGoldfishIsEvil'' ended after 2 seasons, meaning Beanie never exposed that Bubbles is evil and/or stopped him once and for all.
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* ''WesternAnimation/StarWarsTheCloneWars'' was canceled very suddenly despite being successful. The creators were working on a sixth season and had story plans for a seventh and eighth season when Disney acquired the rights to the ''Franchise/StarWars'' franchise and ordered to finish the series, not wanting to ChannelHop the show to any of their networks as part of the acquisition. At this point, multiple episodes were still in different stages of production. [[TheResolutionWillNotBeTelevised 13 episodes were finished and composed Season 6 which aired on]] Creator/{{Netflix}}, 8 more were later released on [=StarWars.com=] with rough incomplete animation, some finished scripts were also adapted into the ''Literature/DarkDisciple'' novel and a ''[[ComicBook/DarthMaulSonOfDathomir Son of Dathomir]]'' comic mini-series. Despite all this, both the last broadcast and the last released episodes serve as a fit ending for the series: one ties up Ahsoka's arc and the other ends with a philosophical conclusion about the greater role of the Jedi in the Clone Wars.
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* ''WesternAnimation/StarWarsTheCloneWars'' was canceled very suddenly despite being successful. The creators were working on a sixth season and had story plans for a seventh and eighth season when Disney acquired the rights to the ''Franchise/StarWars'' franchise and ordered to finish the series, not wanting to ChannelHop the show to any of their networks as part of the acquisition. At this point, multiple episodes were still in different stages of production. [[TheResolutionWillNotBeTelevised [[ConclusionInAnotherMedium 13 episodes were finished and composed Season 6 which aired on]] Creator/{{Netflix}}, 8 more were later released on [=StarWars.com=] with rough incomplete animation, some finished scripts were also adapted into the ''Literature/DarkDisciple'' novel and a ''[[ComicBook/DarthMaulSonOfDathomir Son of Dathomir]]'' comic mini-series. Despite all this, both the last broadcast and the last released episodes serve as a fit ending for the series: one ties up Ahsoka's arc and the other ends with a philosophical conclusion about the greater role of the Jedi in the Clone Wars.
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Updating.
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* ''WesternAnimation/CloneHigh''. The show's first season finale ends in a dramatic {{Cliffhanger}} that involves all of the major plot points — the Abe-Cleo-Joan love triangle, the Secret Board of Shadowy Figures' tensions with Scudworth, the prom — which is never resolved, because there never was a season two. That said, the creators have suggested that they might not have resolved any of this even ''if'' the show had a second season, as aggressively ignoring in-universe continuity would be very on-brand for ''Clone High''[='s=] style of humor.
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* ''WesternAnimation/CloneHigh''. ''WesternAnimation/CloneHigh'' looked like a case of this for nearly two decades. The show's first season finale ends in a dramatic {{Cliffhanger}} that involves all of the major plot points — the Abe-Cleo-Joan love triangle, the Secret Board of Shadowy Figures' tensions with Scudworth, the prom — all which is looked to be never resolved, because there never was a season two. That said, the two just never materialized. The creators have suggested that they might not have resolved any of this even ''if'' the show had a second season, as aggressively ignoring in-universe continuity would be very on-brand for ''Clone High''[='s=] style of humor.humor. However, said second season was finally put into production and released in 2023, ultimately averting this.
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* The second season of ''WesternAnimation/RiseOfTheTeenageMutantNinjaTurtles'', which was originally meant to have 26 half-hours, was abruptly cut by half to 13 half-hours and eventually, the show was cancelled [[ScrewedByTheMerchandise due to low toy sales]].
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* The second season of ''WesternAnimation/RiseOfTheTeenageMutantNinjaTurtles'', which was originally meant to have 26 half-hours, was abruptly cut by half to 13 half-hours and eventually, the show was cancelled [[ScrewedByTheMerchandise due to low toy sales]]. The series did get a GrandFinale in the form of ''WesternAnimation/RiseOfTheTeenageMutantNinjaTurtlesTheMovie'' on Creator/{{Netflix}}.
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* ''WesternAnimation/TheOwlHouse'' had the crew learn during the production of Season 2B that, while they would receive a third season as they hoped, they were OnlyBarelyRenewed, with said season consisting of only three 45-minute specials. These specials did manage to wrap up the overarching narrative, however.
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* ''WesternAnimation/TheOwlHouse'' had the crew learn during the production of Season 2B that, while they would receive a third season as they hoped, they were OnlyBarelyRenewed, with said season consisting of only three 45-minute two 45 and one 55 minute specials. These specials did manage to wrap up the overarching narrative, however.
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* The second season of "WesternAnimation/RiseOfTheTeenageMutantNinjaTurtles", which was originally meant to have 26 half-hours, was abruptly cut by half to 13 half-hours and eventually, the show was cancelled [[ScrewedByTheMerchandise due to low toy sales]].
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* The second season of ''WesternAnimation/RiseOfTheTeenageMutantNinjaTurtles'', which was originally meant to have 26 half-hours, was abruptly cut by half to 13 half-hours and eventually, the show was cancelled [[ScrewedByTheMerchandise due to low toy sales]].
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* The second season of "WesternAnimation/RiseOfTheTeenageMutantNinjaTurtles", which was originally meant to have 26 half-hours, was abruptly cut by half to 13 half-hours and eventually, the show was cancelled [[ScrewedByTheMerchandise due to low toy sales]].
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* ''WesternAnimation/TheOwlHouse'' was supposed to have four seasons, but was abruptly announced to be cancelled after its second due to it “not fitting the [[Creator/{{Disney}} Disney]] brand.” Thankfully, there were three 45-minute specials to help wrap up the overarching narrative.
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* ''WesternAnimation/TheOwlHouse'' was supposed to have four seasons, but was abruptly announced to be cancelled after its second due to it “not fitting had the [[Creator/{{Disney}} Disney]] brand.” Thankfully, there crew learn during the production of Season 2B that, while they would receive a third season as they hoped, they were OnlyBarelyRenewed, with said season consisting of only three 45-minute specials. These specials did manage to help wrap up the overarching narrative.narrative, however.
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Re-added the example. Even though it was resolved, it still ended sooner than planned, so it still counts.
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* ''WesternAnimation/TheOwlHouse'' was supposed to have four seasons, but was abruptly announced to be cancelled after its second due to it “not fitting the [[Creator/{{Disney}} Disney]] brand.” Thankfully, there were three 45-minute specials to help wrap up the overarching narrative.
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The show's third season, short as it is, is still going to resolve the plot.
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* ''WesternAnimation/TheOwlHouse'' was supposed to have four seasons, but was abruptly announced to be cancelled after its second due to it “not fitting the [[Creator/{{Disney}} Disney]] brand.” Thankfully, there were three 45-minute specials to help wrap up the overarching narrative.
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* ''WesternAnimation/PlanetSheen'' was abruptly cancelled after one season before Sheen could return home to Earth or defeat [[BigBad Dorkus]] once and for all. [[note]] There were plans for there to be a TV movie finale where [[WesternAnimation/TheAdventuresOfJimmyNeutronBoyGenius Jimmy Neutron]] rescued Sheen, but due to the series’s low ratings, the film was never made. [[/note]]
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* ''WesternAnimation/PlanetSheen'' was abruptly cancelled after one season due to low ratings before Sheen could return home to Earth or defeat [[BigBad Dorkus]] once and for all. [[note]] There were plans for there to be a TV movie finale where [[WesternAnimation/TheAdventuresOfJimmyNeutronBoyGenius Jimmy Neutron]] rescued Sheen, but due to the series’s low ratings, the film was it never made. [[/note]]came to fruition as a result of the show's cancellation.
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* ''WesternAnimation/The13GhostsOfScoobyDoo'' got ScrewedByTheNetwork and producer Tom Ruegger felt there was no further life to it; it was cancelled after [[ThirteenIsUnlucky 13]] episodes, leaving the series to end on the sad note of just ONE more ghost that needed to be captured... Fortunately, the story would finally be wrapped up years later with ''WesternAnimation/ScoobyDooAndTheCurseOfThe13thGhost''.
* ''WesternAnimation/TheAngryBeavers'' was originally set to have a GrandFinale (for which [[https://www.youtube.com/watch?v=cPP4zUDuo4c dialogue was recorded]]) with the characters learning they were on a TV show that was ending. Nickelodeon, however, [[ExecutiveMeddling gave it the axe]] because it went against their "no ending" policy at the time,[[note]]This policy is no longer in place, having been officially broken with ''WesternAnimation/TheAdventuresOfJimmyNeutronBoyGenius'' GrandFinale "Lady Sings the News".[[/note]] as well as the ending of the episode itself, which involved the Beavers going to [[AscendToAHigherPlaneOfExistence Cartoon Heaven]], being seen as too sad for the target audience to be worth breaking the rule for.
* ''Bailey's Comets'', an obscure [=DePatie=]-Freleng show from 1973 about eleven teams of roller derby skaters going cross country to find clues to a treasure, ended with the treasure unfound. This was largely due to budgetary issues; it was too expensive to have that many characters moving at the same time.
* The 1980s cartoon ''WesternAnimation/TheBluffers'' centered around a group of WoodlandCreatures trying to find out the secret of a villain named Clandestino. It got canceled before they could say what his secret was.
* Because of the series' rather dismal reception, ''WesternAnimation/TheBrothersGrunt'' ended its run without Sammy, Dean, Bing, Frank, and Tony reuniting with their brother Perry and taking him back to their monastery.
* ''WesternAnimation/ButtUglyMartians'' only ran for one season and ended on a cliffhanger where Emperor Bog threatened to come to Earth and kill [=2T=], B-Bop, and Do-Wah for abandoning their mission to invade Earth, the Butt-Uglies and Stoat Muldoon replying that they weren't scared and were willing to give it their all in the inevitable battle.
* ''WesternAnimation/TheBuzzOnMaggie'' ended after one season of 21 episodes due to it failing to gain an audience overseas, with Maggie's dream of becoming famous never achieved.
* ''Around the World in 79 Days,'' a revisionist take on Jules Verne's story which was a segment of 1969's ''WesternAnimation/TheCattanoogaCats'', ended after 17 episodes with the round-the-world trip for Phineas Fogg Jr., Jenny and Happy unfinished.
* The original AnimatedAdaptation of ''WesternAnimation/CliffordTheBigRedDog'' was scheduled to have a third and final season, with an episode in which the titular character gets married and has babies. Unfortunately, the death of Creator/JohnRitter, the person who voiced Clifford, [[DiedDuringProduction on the set of]] ''Series/EightSimpleRules'', led to the final season's cancellation and a new series, ''WesternAnimation/CliffordsPuppyDays'', being produced in its place.
* ''WesternAnimation/CloneHigh''. The show's first season finale ends in a dramatic {{Cliffhanger}} that involves all of the major plot points — the Abe-Cleo-Joan love triangle, the Secret Board of Shadowy Figures' tensions with Scudworth, the prom — which is never resolved, because there never was a season two. That said, the creators have suggested that they might not have resolved any of this even ''if'' the show had a second season, as aggressively ignoring in-universe continuity would be very on-brand for ''Clone High''[='s=] style of humor.
* ''WesternAnimation/DaBoomCrew'' ends with the main characters never beating the game and thus never making it back to Earth.
* ''WesternAnimation/DragonBooster'' was mean to have 5 seasons but was ultimately cut short at 3 due to poor viewership.
* ''WesternAnimation/{{Duckman}}'', which went three seasons without a single {{cliffhanger}}, ended its run with an episode where the title character (a talking duck, private detective and widower) remarries only to have the wedding disrupted by the return of his dead wife, Beatrice. She asks why he didn't wait for her. He says he thought she was dead. She asks why Cornfed (Duckman's partner) didn't tell him the truth. Cornfed says he can explain everything, and ToBeContinued pops up on the screen. Naturally, the one time they ended the season with a cliffhanger expecting renewal, the show was canceled.
* In-Universe example with the show-within-a-show version of ''WesternAnimation/DarkwingDuck'' in ''WesternAnimation/DuckTales2017''. In "Friendship Hates Magic!" when Mrs. Beakley gets into the series, she's aghast to learn it was cancelled on a cliffhanger. This is shown in more detail in "The Duck Knight Returns!": DW confronted a villain who turned out to be ... ''himself''.
* ''WesternAnimation/DungeonsAndDragons1983'' was cancelled prior to a final episode (which was scripted but never animated) that resolved plot threads including whether the characters got home and the relationship between the Dungeon Master and Venger. Good news is the script for the final episode was not only released, but received a fan comic adaption. This comic adaption has since also received an audiovisual adaption that is now on Website/YouTube.
* ''WesternAnimation/TheEmperorsNewSchool'' had plans for a third season that would have made it a SixtyFiveEpisodeCartoon, but production stopped when Music/EarthaKitt, Yzma's voice actress, lost her battle with colon cancer. Fortunately, they were able to cobble together a series finale that wrapped things up fairly well.
* The two American-made HumongousMecha AnimatedSeries from TheNineties, ''WesternAnimation/ExoSquad'' and ''TabletopGame/{{Battletech}}'', both end with unresolved cliffhangers.
* ''WesternAnimation/FinalSpace'' was canned after three seasons, ending on a massive cliffhanger with [[spoiler: the BigGood dead, one of the heroes having pulled a FaceHeelTurn, and the BigBad having escaped from its dimension]].
* The animated adaptation of ''Series/FraggleRock'' ended abruptly at [[ShortRunners 13 episodes]]. According to the Muppet Wiki, NBC chose not to renew it because one of the children disliked the show.
* Averted with ''WesternAnimation/GravityFalls'', which nearly ended with the season one finale "Gideon Rises". Creator/AlexHirsch stated in interviews following the show's conclusion that creating the first season was so stressful and challenging for him, that it was only the show's quickly growing fanbase pushing him to continue on from that episode's cliffhanger that made him willing to create one last season.
* ''WesternAnimation/GreenLanternTheAnimatedSeries'' ended on a cliffhanger after only one season due to poor toy sales. Said cliffhanger revolves around [[spoiler:whether Razer can bring Aya back to life]]. As a result of the cancellation, various plot threads weren't resolved.
* ''WesternAnimation/HeManAndTheMastersOfTheUniverse2002'' [[ShortRunners only lasted 39 episodes]] before being abruptly cancelled, leaving many loose ends unresolved.
* ''WesternAnimation/HeyArnold'' was planned to end with a theatrically released GrandFinale, "The Jungle Movie", which would have resolved practically every plot thread - Arnold goes with his class to San Lorenzo to find his parents, and he finally [[RelationshipUpgrade hooks up with Helga]]. The show's final episodes, "The Journal", were the movie's prologue and ended on a {{cliffhanger}}. Unfortunately, thanks to the box office failure of ''WesternAnimation/HeyArnoldTheMovie'', and because Creator/CraigBartlett couldn't agree with Nickelodeon over a contract extension, the movie was cancelled and the show ended without explaining what happened to Arnold's parents on their final mission. Over the years, many a fan have petitioned to have it made and even Bartlett expressed his wish to come back and make it. Thankfully, in 2015, Nickelodeon -- on a nostalgia kick with the success of Creator/TeenNick's Creator/NickRewind block -- announced that they were finally giving ''[[WesternAnimation/HeyArnoldTheJungleMovie The Jungle Movie]]'' the green light as a two-part TV movie in 2017. Bartlett and most of the original crew, including several of the voice actors, returned as well, much to the delight of fans.
* ''WesternAnimation/{{Hoops}}'' was cancelled after only one season due to low ratings. The series ends on a cliffhanger where Ben and Matty end up getting a flat tire while on their way to Henderson prep. It’s unknown whether or not they make it.
* ''WesternAnimation/InfinityTrain'' ended with four seasons out of a planned eight due to [[ExecutiveMeddling higher-ups thinking the show was "too mature"]] [[AnimationAgeGhetto for its target audience]]. Despite being an anthology with self-contained season-long arcs, the cancellation left the outcomes of two overarching storylines unresolved; those being [[spoiler:whether Amelia will ever manage to get off the train]] and [[spoiler:whereabouts and status of Hazel after being quarantined]].
* ''WesternAnimation/InvaderZim'': Due to low ratings from the target demographic[[labelnote:*]][[PeripheryDemographic It was popular with older audiences]] but not the 6-11 age group Nickelodeon was aiming for[[/labelnote]], the show was cancelled in the middle of producing its second season, though the show would return as a [[ComicBook/InvaderZimOni comic]] over a decade later, with a [[WesternAnimation/InvaderZimEnterTheFlorpus television movie]] following shortly after.
* ''WesternAnimation/KingArthurAndTheKnightsOfJustice'' was unexpectedly cancelled after two seasons and 26 episodes, with its premise (collecting all the {{MacGuffin}}s and freeing the original King and Knights) far from resolution.
* ''WesternAnimation/LittleBill'' was another show that wound up being cancelled when a voice actor who worked on it passed away, with the person in question being Creator/GregoryHines, the voice of Big Bill.
* ''WesternAnimation/TheMagicTrollsAndTheTrollWarriors'' ends with clear plans for a TV series as several plotlines are unresolved, but one wasn't made.
* ''WesternAnimation/{{Metalocalypse}}'' was originally planned to have four seasons and a movie, then ended up in a cliffhanger to make a final one. Unfortunately, Adult Swim and Brendon Smalls had a disagreement about the terms for the series, which led to its final season canceled. Many fans even signed a petition for it, but it fell on deaf ears and Adult Swim kept the rights to the Dethklok name. So instead, Brendon made a SpiritualSuccessor in the form of Music/BrendonSmallsGalaktikon, which served as an audio finale to the series.
* ''WesternAnimation/MegasXLR'', while having something akin to a finale, still had the Glorft on the loose and Coop with a replacement for his Megas but with much better firepower.
* ''WesternAnimation/TheMightyB'' ended after two seasons before Bessie could collect all the Honeybee Scout badges, and/or reveal that [[TheCuckoolanderWasRight she was right about the whole super hero thing all along]].
* ''WesternAnimation/{{Motorcity}}'', from the same people behind ''Megas XLR'', was cut down before its first season had even finished airing. Fortunately, due to having dealt with this trope twice beforehand (the first being ''WesternAnimation/{{Downtown}}''), they had already written the season finale to double as a glorious grand finale in case it happened a third time.
* ''WesternAnimation/TheOwlHouse'' was supposed to have four seasons, but was abruptly announced to be cancelled after its second due to it “not fitting the [[Creator/{{Disney}} Disney]] brand.” Thankfully, there were three 45-minute specials to help wrap up the overarching narrative.
* Season 3 of ''WesternAnimation/PacManAndTheGhostlyAdventures'' concludes with new character Elliptica whispering to Pac the biggest hint to where his parents might be. The franchise was then rebooted back to the Classic designs and universe due to dwindling reception of the reboot, leaving Pac's quest to find his parents a mystery.
* While ''WesternAnimation/PhantomInvestigators'' didn't end on a major cliffhanger, the final episode of its first and only season did imply that more was to come. Due to dissatisfaction with [[GirlShowGhetto not having enough male viewers and too many female viewers]], Creator/KidsWB canned the show as fast as it could. Taken even further in America as Kids' WB was so upset at not getting the exact demographic that they wanted that they removed the show from the schedule after only six episodes had aired.
* ''WesternAnimation/ThePiratesOfDarkWater'' ended before they could gather all 13 {{MacGuffin}}s, or defeat the BigBad. This was one of the first truly infamous examples of this happening in animation, so much so even Creator/CartoonNetwork themselves humorously acknowledged the sudden cancellation in advertising.
* ''WesternAnimation/PlanetSheen'' was abruptly cancelled after one season before Sheen could return home to Earth or defeat [[BigBad Dorkus]] once and for all. [[note]] There were plans for there to be a TV movie finale where [[WesternAnimation/TheAdventuresOfJimmyNeutronBoyGenius Jimmy Neutron]] rescued Sheen, but due to the series’s low ratings, the film was never made. [[/note]]
* ''WesternAnimation/ThePrince2021'' ends on a cliffhanger where Kevin gives the royal family poisoned tarts. Due to low ratings, it was quickly cancelled after only one season, and with the death of [[UsefulNotes/ElizabethII Queen Elizabeth]], it’s unlikely to ever get renewed.
* The ''Literature/{{Redwall}}'' cartoon was canned after three seasons before it could adapt any more of the books. The series finale, "Rose of Noonvale", plays out like a regular season finale for the show, but instead of ending with tapestry shots as usual, Tim Churchmouse asks the viewer to come back soon, which implies that more was to come, making one wonder what the producers were planning to do next.
* ''WesternAnimation/ReturnToThePlanetOfTheApes'' ended with no resolution to Bill, Jeff, Judy, Cornelius and Zira's efforts to end the status quo of humans being subservient to apes. While it was considered to renew the show for a three-episode second season to wrap everything up, it never came to fruition.
* ''WesternAnimation/SagwaTheChineseSiameseCat'' ended after one season due to a lack of merchandise and PBS being unable to compete with news coverage after the 9/11 attacks took place. Sure, there were no story arcs, but the last episode did imply that more was to come. Like with ''WesternAnimation/TheWackyAdventuresOfRonaldMcdonald'' mentioned below, it makes you wonder what the creators were planning next.
* ''WesternAnimation/SamuraiJack'' ran for four seasons before [[Creator/GenndyTartakovsky Genndy]] ended it to focus on other ventures, leaving no real ending. He personally viewed it as an extended hiatus, however, as he planned to make a theatrical film to wrap up the series. However, it would end up repeatedly stuck in DevelopmentHell. There would be a comic book continuation a decade later that took place after season four, complete with its own grand finale, but Taratvosky considered its events non-canon. For his part, he would finally ditch the movie idea in the wake of the comic's success to produce an official fifth and final season for Creator/AdultSwim that aired in 2017, wrapping up Jack's adventure after a 13-year hiatus.
* ''WesternAnimation/{{Shazzan}}'': Chuck and Nancy never found the ring's owner and never returned home.
* ''WesternAnimation/SheZow'' just ''stops'' after the initial 26-episode run, giving the impression that the series was intended to continue past the first season. Indeed, WordOfGod says the show was initially greenlit by [[Creator/DiscoveryFamily The Hub]] for a second season, only for the network to change their minds a month later.
* ''WesternAnimation/{{Silverwing}}'' ended after just 13 episodes before the rest of the novels could be adapted for television. Thankfully it did conclude the second book’s story, so it was at least able to finish Shade’s main arc.
* Two animated shows starring ''Franchise/SonicTheHedgehog'' weren't fast enough to get their stories finished before cancellation.
** ''WesternAnimation/SonicTheHedgehogSatAM'' ended on a cliffhanger in which Dr. Robotnik appeared to have died but his increasingly dissatisfied henchman Snively has plans to usurp his place as the series' primary antagonist and revealing a threatening new foe, shown out of the darkness with menacing red eyes. Whoever this new character was, viewers never found out, as the series was abruptly cancelled. Writer Ben Hurst revealed his plans for a third season where the mysterious red eyes belonged to [[spoiler:Naugus, an EvilSorcerer who Robotnik betrayed years prior]].
** ''WesternAnimation/SonicUnderground'' ended after only one season, way before Sonic and his siblings could even come close to dethroning Robotnik and finding their mother. ''ComicBook/SonicTheHedgehogArchieComics'' intended to rectify this, but the project ended up cancelled. Fans from ''all across the Internet'' have made fanmade reboots of the series, including [[https://sonicfanon.fandom.com/wiki/Category:AngieYaz_Sonic_Underground_reboot this one]].
* ''WesternAnimation/SpacePOP'' was written off at a loss in August 2018, leaving the series to end on a cliffhanger where the princesses revealed their identities to Geela and Athena put on the Ring of Grock to try to defeat her.
* Another Spidey example is ''WesternAnimation/TheSpectacularSpiderMan'' which left many a plot thread hanging. You can thank Creator/{{Sony}} and Creator/{{Disney}}'s purchase of Marvel for this. Sony had to relinquish the television rights to keep the film rights.
* ''WesternAnimation/SpiderManUnlimited'' ended on a cliffhanger after one season due to low ratings.
* ''WesternAnimation/StarWarsTheCloneWars'' was canceled very suddenly despite being successful. The creators were working on a sixth season and had story plans for a seventh and eighth season when Disney acquired the rights to the ''Franchise/StarWars'' franchise and ordered to finish the series, not wanting to ChannelHop the show to any of their networks as part of the acquisition. At this point, multiple episodes were still in different stages of production. [[TheResolutionWillNotBeTelevised 13 episodes were finished and composed Season 6 which aired on]] Creator/{{Netflix}}, 8 more were later released on [=StarWars.com=] with rough incomplete animation, some finished scripts were also adapted into the ''Literature/DarkDisciple'' novel and a ''[[ComicBook/DarthMaulSonOfDathomir Son of Dathomir]]'' comic mini-series. Despite all this, both the last broadcast and the last released episodes serve as a fit ending for the series: one ties up Ahsoka's arc and the other ends with a philosophical conclusion about the greater role of the Jedi in the Clone Wars.
** Also helping is that Disney later made the sequel series ''WesternAnimation/StarWarsRebels'', with Rex and Ahsoka making appearances.
** In July 2018, a [[WesternAnimation/StarWarsTheCloneWarsSeasonSeven seventh season]] airing on Disney's new streaming service was announced, with thunderous applause from the fans.
* The ''Literature/{{Stellaluna}}'' DirectToVideo movie finishes with a seemingly clear plan for a TV series adaptation of the original book, but one never got made.
* When ''WesternAnimation/{{Stoked}}'' aired on Creator/CartoonNetwork in the United States, the show ended at "Endless Bummer", which was the 22nd episode of the first season. The show had four more episodes of said season, and none of the episodes from the second season aired in the United States.
* The season 1 finale of ''WesternAnimation/StrokerAndHoop'' was as close to a literal cliffhanger as they come. The episode ends with Stroker, Hoop, and Double Wide plunging to a chasm when their captor intentionally lands on the release switch, after being held at gunpoint. Sadly, the show was axed afterwards due to financial reasons, though the creators were able to reveal what would have happened in the end, had the show had been renewed for a second season.
* ''WesternAnimation/SuperRobotMonkeyTeamHyperforceGo'' ended right when the BigBad had been resurrected and the Hyperforce and [[GondorCallsForAid all of their previous allies]] where about to go at him.
* ''WesternAnimation/SwatKats'' didn't end on a {{Cliffhanger}}, but the series abruptly got cancelled while the writers still had several episode ideas in planning.
* ''WesternAnimation/SymBionicTitan'', which was cancelled because [[ScrewedByTheMerchandise they could not interest toy companies]] and a splintering of the production team that made it hard to keep it going, despite it being a widely loved show.
* ''WesternAnimation/ThunderCats2011'' was cancelled after its first season, leaving it to end on a cliffhanger. At the time of its cancellation, the creators Shannon Eric Denton and Dan Norton were working on story ideas for a second season, which would've lasted for 39 episodes.
* ''WesternAnimation/TimothyGoesToSchool'' ended after two seasons (for a long time, it was assumed both seasons were one single season), [[LastEpisodeNewCharacter with the last episode introducing Mexican student Juanita and her family]], while also hinting more was to come.
* ''WesternAnimation/TransformersAnimated''. Due to its abrupt cancellation, it ended with many unresolved plotlines and unexplored characters. The creators were able to weave a mostly satisfying ending, but still the final episode itself only resolved a ''fraction'' of the many plot points introduced earlier in the season.
* ''WesternAnimation/{{Trollz}}'' was canned after one season with its second season already in planning, ''and'' with the last episode hinting that more was to come. Several second season episodes had their titles prepared, but until WordOfGod reveals what those episodes' plots were, the fandom will be left without several answers.
* Every single one of the videos in the series ''WesternAnimation/TheWackyAdventuresOfRonaldMcdonald'' ends with an announcer telling the audience to look for Ronald's next adventure. This includes "The Monster O'[=McDonaldland=] Loch" even though it was the last video ever made. There wasn't an overarching story to the episodes so this wasn’t really painful, but it does make one wonder what the creators were planning next.
* ''WesternAnimation/WanderOverYonder'' met its fate because Disney thought that 80 episodes was long enough for a series, and were going to make more money by showing re-runs on Disney XD rather than giving it a third season. Similar to other examples here, the show's main conflict was fortunately resolved, but some plot threads were still left dangling.
* ''WesternAnimation/WolverineAndTheXMen2009:'' The last episode ended with a scene in which Apocalypse rules in the future leaving no clue as to what's going to happen next. The show only lasted one season.
* ''WesternAnimation/TheAngryBeavers'' was originally set to have a GrandFinale (for which [[https://www.youtube.com/watch?v=cPP4zUDuo4c dialogue was recorded]]) with the characters learning they were on a TV show that was ending. Nickelodeon, however, [[ExecutiveMeddling gave it the axe]] because it went against their "no ending" policy at the time,[[note]]This policy is no longer in place, having been officially broken with ''WesternAnimation/TheAdventuresOfJimmyNeutronBoyGenius'' GrandFinale "Lady Sings the News".[[/note]] as well as the ending of the episode itself, which involved the Beavers going to [[AscendToAHigherPlaneOfExistence Cartoon Heaven]], being seen as too sad for the target audience to be worth breaking the rule for.
* ''Bailey's Comets'', an obscure [=DePatie=]-Freleng show from 1973 about eleven teams of roller derby skaters going cross country to find clues to a treasure, ended with the treasure unfound. This was largely due to budgetary issues; it was too expensive to have that many characters moving at the same time.
* The 1980s cartoon ''WesternAnimation/TheBluffers'' centered around a group of WoodlandCreatures trying to find out the secret of a villain named Clandestino. It got canceled before they could say what his secret was.
* Because of the series' rather dismal reception, ''WesternAnimation/TheBrothersGrunt'' ended its run without Sammy, Dean, Bing, Frank, and Tony reuniting with their brother Perry and taking him back to their monastery.
* ''WesternAnimation/ButtUglyMartians'' only ran for one season and ended on a cliffhanger where Emperor Bog threatened to come to Earth and kill [=2T=], B-Bop, and Do-Wah for abandoning their mission to invade Earth, the Butt-Uglies and Stoat Muldoon replying that they weren't scared and were willing to give it their all in the inevitable battle.
* ''WesternAnimation/TheBuzzOnMaggie'' ended after one season of 21 episodes due to it failing to gain an audience overseas, with Maggie's dream of becoming famous never achieved.
* ''Around the World in 79 Days,'' a revisionist take on Jules Verne's story which was a segment of 1969's ''WesternAnimation/TheCattanoogaCats'', ended after 17 episodes with the round-the-world trip for Phineas Fogg Jr., Jenny and Happy unfinished.
* The original AnimatedAdaptation of ''WesternAnimation/CliffordTheBigRedDog'' was scheduled to have a third and final season, with an episode in which the titular character gets married and has babies. Unfortunately, the death of Creator/JohnRitter, the person who voiced Clifford, [[DiedDuringProduction on the set of]] ''Series/EightSimpleRules'', led to the final season's cancellation and a new series, ''WesternAnimation/CliffordsPuppyDays'', being produced in its place.
* ''WesternAnimation/CloneHigh''. The show's first season finale ends in a dramatic {{Cliffhanger}} that involves all of the major plot points — the Abe-Cleo-Joan love triangle, the Secret Board of Shadowy Figures' tensions with Scudworth, the prom — which is never resolved, because there never was a season two. That said, the creators have suggested that they might not have resolved any of this even ''if'' the show had a second season, as aggressively ignoring in-universe continuity would be very on-brand for ''Clone High''[='s=] style of humor.
* ''WesternAnimation/DaBoomCrew'' ends with the main characters never beating the game and thus never making it back to Earth.
* ''WesternAnimation/DragonBooster'' was mean to have 5 seasons but was ultimately cut short at 3 due to poor viewership.
* ''WesternAnimation/{{Duckman}}'', which went three seasons without a single {{cliffhanger}}, ended its run with an episode where the title character (a talking duck, private detective and widower) remarries only to have the wedding disrupted by the return of his dead wife, Beatrice. She asks why he didn't wait for her. He says he thought she was dead. She asks why Cornfed (Duckman's partner) didn't tell him the truth. Cornfed says he can explain everything, and ToBeContinued pops up on the screen. Naturally, the one time they ended the season with a cliffhanger expecting renewal, the show was canceled.
* In-Universe example with the show-within-a-show version of ''WesternAnimation/DarkwingDuck'' in ''WesternAnimation/DuckTales2017''. In "Friendship Hates Magic!" when Mrs. Beakley gets into the series, she's aghast to learn it was cancelled on a cliffhanger. This is shown in more detail in "The Duck Knight Returns!": DW confronted a villain who turned out to be ... ''himself''.
* ''WesternAnimation/DungeonsAndDragons1983'' was cancelled prior to a final episode (which was scripted but never animated) that resolved plot threads including whether the characters got home and the relationship between the Dungeon Master and Venger. Good news is the script for the final episode was not only released, but received a fan comic adaption. This comic adaption has since also received an audiovisual adaption that is now on Website/YouTube.
* ''WesternAnimation/TheEmperorsNewSchool'' had plans for a third season that would have made it a SixtyFiveEpisodeCartoon, but production stopped when Music/EarthaKitt, Yzma's voice actress, lost her battle with colon cancer. Fortunately, they were able to cobble together a series finale that wrapped things up fairly well.
* The two American-made HumongousMecha AnimatedSeries from TheNineties, ''WesternAnimation/ExoSquad'' and ''TabletopGame/{{Battletech}}'', both end with unresolved cliffhangers.
* ''WesternAnimation/FinalSpace'' was canned after three seasons, ending on a massive cliffhanger with [[spoiler: the BigGood dead, one of the heroes having pulled a FaceHeelTurn, and the BigBad having escaped from its dimension]].
* The animated adaptation of ''Series/FraggleRock'' ended abruptly at [[ShortRunners 13 episodes]]. According to the Muppet Wiki, NBC chose not to renew it because one of the children disliked the show.
* Averted with ''WesternAnimation/GravityFalls'', which nearly ended with the season one finale "Gideon Rises". Creator/AlexHirsch stated in interviews following the show's conclusion that creating the first season was so stressful and challenging for him, that it was only the show's quickly growing fanbase pushing him to continue on from that episode's cliffhanger that made him willing to create one last season.
* ''WesternAnimation/GreenLanternTheAnimatedSeries'' ended on a cliffhanger after only one season due to poor toy sales. Said cliffhanger revolves around [[spoiler:whether Razer can bring Aya back to life]]. As a result of the cancellation, various plot threads weren't resolved.
* ''WesternAnimation/HeManAndTheMastersOfTheUniverse2002'' [[ShortRunners only lasted 39 episodes]] before being abruptly cancelled, leaving many loose ends unresolved.
* ''WesternAnimation/HeyArnold'' was planned to end with a theatrically released GrandFinale, "The Jungle Movie", which would have resolved practically every plot thread - Arnold goes with his class to San Lorenzo to find his parents, and he finally [[RelationshipUpgrade hooks up with Helga]]. The show's final episodes, "The Journal", were the movie's prologue and ended on a {{cliffhanger}}. Unfortunately, thanks to the box office failure of ''WesternAnimation/HeyArnoldTheMovie'', and because Creator/CraigBartlett couldn't agree with Nickelodeon over a contract extension, the movie was cancelled and the show ended without explaining what happened to Arnold's parents on their final mission. Over the years, many a fan have petitioned to have it made and even Bartlett expressed his wish to come back and make it. Thankfully, in 2015, Nickelodeon -- on a nostalgia kick with the success of Creator/TeenNick's Creator/NickRewind block -- announced that they were finally giving ''[[WesternAnimation/HeyArnoldTheJungleMovie The Jungle Movie]]'' the green light as a two-part TV movie in 2017. Bartlett and most of the original crew, including several of the voice actors, returned as well, much to the delight of fans.
* ''WesternAnimation/{{Hoops}}'' was cancelled after only one season due to low ratings. The series ends on a cliffhanger where Ben and Matty end up getting a flat tire while on their way to Henderson prep. It’s unknown whether or not they make it.
* ''WesternAnimation/InfinityTrain'' ended with four seasons out of a planned eight due to [[ExecutiveMeddling higher-ups thinking the show was "too mature"]] [[AnimationAgeGhetto for its target audience]]. Despite being an anthology with self-contained season-long arcs, the cancellation left the outcomes of two overarching storylines unresolved; those being [[spoiler:whether Amelia will ever manage to get off the train]] and [[spoiler:whereabouts and status of Hazel after being quarantined]].
* ''WesternAnimation/InvaderZim'': Due to low ratings from the target demographic[[labelnote:*]][[PeripheryDemographic It was popular with older audiences]] but not the 6-11 age group Nickelodeon was aiming for[[/labelnote]], the show was cancelled in the middle of producing its second season, though the show would return as a [[ComicBook/InvaderZimOni comic]] over a decade later, with a [[WesternAnimation/InvaderZimEnterTheFlorpus television movie]] following shortly after.
* ''WesternAnimation/KingArthurAndTheKnightsOfJustice'' was unexpectedly cancelled after two seasons and 26 episodes, with its premise (collecting all the {{MacGuffin}}s and freeing the original King and Knights) far from resolution.
* ''WesternAnimation/LittleBill'' was another show that wound up being cancelled when a voice actor who worked on it passed away, with the person in question being Creator/GregoryHines, the voice of Big Bill.
* ''WesternAnimation/TheMagicTrollsAndTheTrollWarriors'' ends with clear plans for a TV series as several plotlines are unresolved, but one wasn't made.
* ''WesternAnimation/{{Metalocalypse}}'' was originally planned to have four seasons and a movie, then ended up in a cliffhanger to make a final one. Unfortunately, Adult Swim and Brendon Smalls had a disagreement about the terms for the series, which led to its final season canceled. Many fans even signed a petition for it, but it fell on deaf ears and Adult Swim kept the rights to the Dethklok name. So instead, Brendon made a SpiritualSuccessor in the form of Music/BrendonSmallsGalaktikon, which served as an audio finale to the series.
* ''WesternAnimation/MegasXLR'', while having something akin to a finale, still had the Glorft on the loose and Coop with a replacement for his Megas but with much better firepower.
* ''WesternAnimation/TheMightyB'' ended after two seasons before Bessie could collect all the Honeybee Scout badges, and/or reveal that [[TheCuckoolanderWasRight she was right about the whole super hero thing all along]].
* ''WesternAnimation/{{Motorcity}}'', from the same people behind ''Megas XLR'', was cut down before its first season had even finished airing. Fortunately, due to having dealt with this trope twice beforehand (the first being ''WesternAnimation/{{Downtown}}''), they had already written the season finale to double as a glorious grand finale in case it happened a third time.
* ''WesternAnimation/TheOwlHouse'' was supposed to have four seasons, but was abruptly announced to be cancelled after its second due to it “not fitting the [[Creator/{{Disney}} Disney]] brand.” Thankfully, there were three 45-minute specials to help wrap up the overarching narrative.
* Season 3 of ''WesternAnimation/PacManAndTheGhostlyAdventures'' concludes with new character Elliptica whispering to Pac the biggest hint to where his parents might be. The franchise was then rebooted back to the Classic designs and universe due to dwindling reception of the reboot, leaving Pac's quest to find his parents a mystery.
* While ''WesternAnimation/PhantomInvestigators'' didn't end on a major cliffhanger, the final episode of its first and only season did imply that more was to come. Due to dissatisfaction with [[GirlShowGhetto not having enough male viewers and too many female viewers]], Creator/KidsWB canned the show as fast as it could. Taken even further in America as Kids' WB was so upset at not getting the exact demographic that they wanted that they removed the show from the schedule after only six episodes had aired.
* ''WesternAnimation/ThePiratesOfDarkWater'' ended before they could gather all 13 {{MacGuffin}}s, or defeat the BigBad. This was one of the first truly infamous examples of this happening in animation, so much so even Creator/CartoonNetwork themselves humorously acknowledged the sudden cancellation in advertising.
* ''WesternAnimation/PlanetSheen'' was abruptly cancelled after one season before Sheen could return home to Earth or defeat [[BigBad Dorkus]] once and for all. [[note]] There were plans for there to be a TV movie finale where [[WesternAnimation/TheAdventuresOfJimmyNeutronBoyGenius Jimmy Neutron]] rescued Sheen, but due to the series’s low ratings, the film was never made. [[/note]]
* ''WesternAnimation/ThePrince2021'' ends on a cliffhanger where Kevin gives the royal family poisoned tarts. Due to low ratings, it was quickly cancelled after only one season, and with the death of [[UsefulNotes/ElizabethII Queen Elizabeth]], it’s unlikely to ever get renewed.
* The ''Literature/{{Redwall}}'' cartoon was canned after three seasons before it could adapt any more of the books. The series finale, "Rose of Noonvale", plays out like a regular season finale for the show, but instead of ending with tapestry shots as usual, Tim Churchmouse asks the viewer to come back soon, which implies that more was to come, making one wonder what the producers were planning to do next.
* ''WesternAnimation/ReturnToThePlanetOfTheApes'' ended with no resolution to Bill, Jeff, Judy, Cornelius and Zira's efforts to end the status quo of humans being subservient to apes. While it was considered to renew the show for a three-episode second season to wrap everything up, it never came to fruition.
* ''WesternAnimation/SagwaTheChineseSiameseCat'' ended after one season due to a lack of merchandise and PBS being unable to compete with news coverage after the 9/11 attacks took place. Sure, there were no story arcs, but the last episode did imply that more was to come. Like with ''WesternAnimation/TheWackyAdventuresOfRonaldMcdonald'' mentioned below, it makes you wonder what the creators were planning next.
* ''WesternAnimation/SamuraiJack'' ran for four seasons before [[Creator/GenndyTartakovsky Genndy]] ended it to focus on other ventures, leaving no real ending. He personally viewed it as an extended hiatus, however, as he planned to make a theatrical film to wrap up the series. However, it would end up repeatedly stuck in DevelopmentHell. There would be a comic book continuation a decade later that took place after season four, complete with its own grand finale, but Taratvosky considered its events non-canon. For his part, he would finally ditch the movie idea in the wake of the comic's success to produce an official fifth and final season for Creator/AdultSwim that aired in 2017, wrapping up Jack's adventure after a 13-year hiatus.
* ''WesternAnimation/{{Shazzan}}'': Chuck and Nancy never found the ring's owner and never returned home.
* ''WesternAnimation/SheZow'' just ''stops'' after the initial 26-episode run, giving the impression that the series was intended to continue past the first season. Indeed, WordOfGod says the show was initially greenlit by [[Creator/DiscoveryFamily The Hub]] for a second season, only for the network to change their minds a month later.
* ''WesternAnimation/{{Silverwing}}'' ended after just 13 episodes before the rest of the novels could be adapted for television. Thankfully it did conclude the second book’s story, so it was at least able to finish Shade’s main arc.
* Two animated shows starring ''Franchise/SonicTheHedgehog'' weren't fast enough to get their stories finished before cancellation.
** ''WesternAnimation/SonicTheHedgehogSatAM'' ended on a cliffhanger in which Dr. Robotnik appeared to have died but his increasingly dissatisfied henchman Snively has plans to usurp his place as the series' primary antagonist and revealing a threatening new foe, shown out of the darkness with menacing red eyes. Whoever this new character was, viewers never found out, as the series was abruptly cancelled. Writer Ben Hurst revealed his plans for a third season where the mysterious red eyes belonged to [[spoiler:Naugus, an EvilSorcerer who Robotnik betrayed years prior]].
** ''WesternAnimation/SonicUnderground'' ended after only one season, way before Sonic and his siblings could even come close to dethroning Robotnik and finding their mother. ''ComicBook/SonicTheHedgehogArchieComics'' intended to rectify this, but the project ended up cancelled. Fans from ''all across the Internet'' have made fanmade reboots of the series, including [[https://sonicfanon.fandom.com/wiki/Category:AngieYaz_Sonic_Underground_reboot this one]].
* ''WesternAnimation/SpacePOP'' was written off at a loss in August 2018, leaving the series to end on a cliffhanger where the princesses revealed their identities to Geela and Athena put on the Ring of Grock to try to defeat her.
* Another Spidey example is ''WesternAnimation/TheSpectacularSpiderMan'' which left many a plot thread hanging. You can thank Creator/{{Sony}} and Creator/{{Disney}}'s purchase of Marvel for this. Sony had to relinquish the television rights to keep the film rights.
* ''WesternAnimation/SpiderManUnlimited'' ended on a cliffhanger after one season due to low ratings.
* ''WesternAnimation/StarWarsTheCloneWars'' was canceled very suddenly despite being successful. The creators were working on a sixth season and had story plans for a seventh and eighth season when Disney acquired the rights to the ''Franchise/StarWars'' franchise and ordered to finish the series, not wanting to ChannelHop the show to any of their networks as part of the acquisition. At this point, multiple episodes were still in different stages of production. [[TheResolutionWillNotBeTelevised 13 episodes were finished and composed Season 6 which aired on]] Creator/{{Netflix}}, 8 more were later released on [=StarWars.com=] with rough incomplete animation, some finished scripts were also adapted into the ''Literature/DarkDisciple'' novel and a ''[[ComicBook/DarthMaulSonOfDathomir Son of Dathomir]]'' comic mini-series. Despite all this, both the last broadcast and the last released episodes serve as a fit ending for the series: one ties up Ahsoka's arc and the other ends with a philosophical conclusion about the greater role of the Jedi in the Clone Wars.
** Also helping is that Disney later made the sequel series ''WesternAnimation/StarWarsRebels'', with Rex and Ahsoka making appearances.
** In July 2018, a [[WesternAnimation/StarWarsTheCloneWarsSeasonSeven seventh season]] airing on Disney's new streaming service was announced, with thunderous applause from the fans.
* The ''Literature/{{Stellaluna}}'' DirectToVideo movie finishes with a seemingly clear plan for a TV series adaptation of the original book, but one never got made.
* When ''WesternAnimation/{{Stoked}}'' aired on Creator/CartoonNetwork in the United States, the show ended at "Endless Bummer", which was the 22nd episode of the first season. The show had four more episodes of said season, and none of the episodes from the second season aired in the United States.
* The season 1 finale of ''WesternAnimation/StrokerAndHoop'' was as close to a literal cliffhanger as they come. The episode ends with Stroker, Hoop, and Double Wide plunging to a chasm when their captor intentionally lands on the release switch, after being held at gunpoint. Sadly, the show was axed afterwards due to financial reasons, though the creators were able to reveal what would have happened in the end, had the show had been renewed for a second season.
* ''WesternAnimation/SuperRobotMonkeyTeamHyperforceGo'' ended right when the BigBad had been resurrected and the Hyperforce and [[GondorCallsForAid all of their previous allies]] where about to go at him.
* ''WesternAnimation/SwatKats'' didn't end on a {{Cliffhanger}}, but the series abruptly got cancelled while the writers still had several episode ideas in planning.
* ''WesternAnimation/SymBionicTitan'', which was cancelled because [[ScrewedByTheMerchandise they could not interest toy companies]] and a splintering of the production team that made it hard to keep it going, despite it being a widely loved show.
* ''WesternAnimation/ThunderCats2011'' was cancelled after its first season, leaving it to end on a cliffhanger. At the time of its cancellation, the creators Shannon Eric Denton and Dan Norton were working on story ideas for a second season, which would've lasted for 39 episodes.
* ''WesternAnimation/TimothyGoesToSchool'' ended after two seasons (for a long time, it was assumed both seasons were one single season), [[LastEpisodeNewCharacter with the last episode introducing Mexican student Juanita and her family]], while also hinting more was to come.
* ''WesternAnimation/TransformersAnimated''. Due to its abrupt cancellation, it ended with many unresolved plotlines and unexplored characters. The creators were able to weave a mostly satisfying ending, but still the final episode itself only resolved a ''fraction'' of the many plot points introduced earlier in the season.
* ''WesternAnimation/{{Trollz}}'' was canned after one season with its second season already in planning, ''and'' with the last episode hinting that more was to come. Several second season episodes had their titles prepared, but until WordOfGod reveals what those episodes' plots were, the fandom will be left without several answers.
* Every single one of the videos in the series ''WesternAnimation/TheWackyAdventuresOfRonaldMcdonald'' ends with an announcer telling the audience to look for Ronald's next adventure. This includes "The Monster O'[=McDonaldland=] Loch" even though it was the last video ever made. There wasn't an overarching story to the episodes so this wasn’t really painful, but it does make one wonder what the creators were planning next.
* ''WesternAnimation/WanderOverYonder'' met its fate because Disney thought that 80 episodes was long enough for a series, and were going to make more money by showing re-runs on Disney XD rather than giving it a third season. Similar to other examples here, the show's main conflict was fortunately resolved, but some plot threads were still left dangling.
* ''WesternAnimation/WolverineAndTheXMen2009:'' The last episode ended with a scene in which Apocalypse rules in the future leaving no clue as to what's going to happen next. The show only lasted one season.
