History SeriesContinuityError / TheDCU

** The thing that solidifies Hal's FaceHeelTurn is using his ring to obliterate Kilowog, something that couldn't happen at that time and would be a major plot point in ''ComicBook/TheSinestroCorpsWar''.

* Ed Brubaker's run on ''ComicBook/{{Catwoman}}'' reintroduced Holly Robinson, Selina's room-mate and sex-work protegee from ''Batman: Year One'' and ''Her Sister's Keeper'', as her new sidekick. Unfortunately, Holly had previously been killed off, after being given completely different CharacterDevelopment as a mob wife, in a story from the ''Action Comics Weekly'' anthology series. Rather than make any attempt at {{Retcon}}, Brubaker simply acknowledged the error in a short LeaningOnTheFourthWall comedy piece included in the ''Catwoman: Secret Files and Origins'' one-shot. He admitted both in the piece and in interviews that he simply hadn't known about Holly's death, given the relative obscurity of the comic where it happened. The intervening ''ComicBook/ZeroHourCrisisInTime'' CosmicRetcon provides an easy in-universe explanation for fans who really want one.

** Both Pre-Crisis [[Franchise/TheFlash Barry Allen and Jay Garrick]] refer to the Speed Force, something neither of them should have any knowledge of since the concept wasn't created until the post-Crisis Wally West Flash series. Barry's opponent, Tangent Comics Superman, mentions this.
** 90s hook-handed Aquaman is pining for Mera, but the two of them were separated and not on good terms at all during that time period.
** Kyle Rayner's ring talks to him and welcomes him back to the Franchise/GreenLantern Corps, but the Corps was disbanded when he first became a GL[[note]]While Kyle did make some attempts at re-forming the Corps, it was never successfully formed again until the start of Creator/GeoffJohns' run after Hal Jordan's resurrection.[[/note]], and Kyle's ring rarely spoke to him, if ever. He shouldn't know anything about Qward either, having not encountered the Weaponers that early in his career.

** The status quo of the West family is that of the final issues of Wally's own series. This changed dramatically in ''Flash: Rebirth''. The idea that pre-''Flashpoint'' Gotham was taken before Barry's return (i.e. three years before ''Flashpoint'') doesn't jibe with any of the other stories.

* ''ComicBook/WonderGirl'': Donna Troy's entire existence resulted from such an error. ''ComicBook/TeenTitans'' originated as a team-up of several sidekicks. But it was completely forgotten by the writers that Wonder Girl ''wasn't'' ComicBook/WonderWoman's sidekick, she was Wonder Woman herself as a teenager. When somebody remembered this fact, the {{retcon}} to explain it gave the Titans' version of Wonder Girl her own identity as Donna Troy and (eventually) a truly convoluted history.

** The version of ''Comicbook/CrisisOnInfiniteEarths'' (actually based more on ''Last Days of the Justice Society'') has Surtur claim he already killed a Wonder Woman. But whether New Earth was primarily based on Earth-1 or Earth-2, there should still only be one instance of every character whose counterpart was an ''exact'' duplicate, including Diana.
* ''ComicBook/Earth2'': The third and final volume ''Earth 2: Society'' has a few glaring discrepancies in continuity in regards to the first two volumes, the most notable ones being that the god that gave Jay Garrick his powers as the Flash is misidentified as Apollo rather than Mercury as well as Alan Scott's ring stated to be an Oan power ring that chose him to be the Green Lantern and Sinestro being mentioned as one of the supervillains who menaced Earth during the Age of Wonders, which contradicts the earlier volumes establishing that Alan Scott's ring was the engagement ring of his deceased boyfriend Sam Zhao and was chosen because an object was needed to focus the power of the Green, in addition to the previous volumes giving no indication that the Green Lantern Corps existed in this continuity.
* The ''ComicBook/GreenLantern'' storyline ''ComicBook/EmeraldTwilight'' runs on this trope. Seeing as the editors wanted the old Corps gone and replaced with Kyle Rayner and his inexperience, it had to be done.
** The big thing of this story is that the Guardians of the Universe, the tiny blue midgets that run the Green Lantern Corps, are completely helpless to stop Hal Jordan's rampage and are only able to send other Lanterns and later Sinestro against Hal. The thing is, they could have stopped Hal's usage in an instant as they have the ability to instantly drain a ring of its power.
** The thing that solidifies Hal's FaceHeelTurn is using his ring to obliterate Kilowog, something that couldn't happen at that time and would be a major plot point in ''ComicBook/TheSinestroCorpsWar''.

* ''ComicBook/LegionOfSuperheroes'': ''ComicBook/LegionOfThreeWorlds'' mostly does a good job in keeping track of the different Legions. However, the flashback to their ForgottenFirstMeeting is meant to show the Legions as they were in their respective early days, and while it gets most of them right, it shows Reboot Brainiac 5 looking the same as he does in the "present"; short hair, Brainiac-logo forehead disks, and a costume with black sides and a purple front. In the early post-Zero Hour years he had shoulder lenghth hair, no disks, and his costume colours were reversed. And the scene also shows Kid Quantum I and Leviathan, who both died before Brainy got his cosmic makeover in ''LSH'' #104.

* The ''Comicbook/LegionOfSuperheroes'' ''Comicbook/FinalCrisis'' tie-in ''ComicBook/LegionOfThreeWorlds'' mostly does a good job in keeping track of the Reboot, Threeboot, and Retroboot Legions. However, the flashback to their ForgottenFirstMeeting is meant to show the Legions as they were in their respective early days, and while it gets most of them right, it shows Reboot Brainiac 5 looking the same as he does in the "present"; short hair, Brainiac-logo forehead disks, and a costume with black sides and a purple front. In the early post-Zero Hour years he had shoulder lenghth hair, no disks, and his costume colours were reversed. And the scene also shows Kid Quantum I and Leviathan, who both died before Brainy got his cosmic makeover in ''LSH'' #104.

** In ''Comicbook/{{Superboy}}'' #89, a tie in to ''Comicbook/OurWorldsAtWar'', Superboy is looking after a young clone of the Guardian, who says he remembers being a soldier and is scared he'll have to be one again. It's not clear where the clone gets these memories from, but it's not the original Guardian; Jim Harper was a policeman and therefore did all his fighting, both in constume and out, on the home front, with a previous story having specifically played on his guilt that he never saw action in WWII.

** In "ComicBook/SupermanVsMuhammadAli", Superman does not know a thing about boxing, contradicting earlier stories like ''ComicBook/Superman1939'' #2 and ''ComicBook/AdventureComics'' #273 wherein Clark Kent learned to box.

** Superwoman of Earth-3 is referred to as Lois Lane by several of her fellow Crime Syndicate members. Pre-Crisis Earth-3 Lois Lane was a separate character from Superwoman and the wife of that reality's Lex Luthor, with the Superwoman of the Antimatter Crime Syndicate that was introduced in ''ComicBook/JLAEarth2'' being the one to have Lois Lane as her civilian name.

** Though the inconsistency could be excused somewhat by the story aiming for a more humorous and irreverent tone, the ''Supergirl: Matrix'' tie-in establishes Lord Volt and Lady Quark to resent each other with the heavy implication that it's because they're gay and have been forced into an ArrangedMarriage. This is in disregard of ''ComicBook/CrisisOnInfiniteEarths'' establishing Lady Quark as genuinely loving her husband and being upset about his death after she becomes the sole survivor of her world when it was wiped out from existence by the Anti-Monitor.

** Kyle Rayner's ring talks to him and welcomes him back to the Franchise/GreenLantern Corps, but the Corps did not exist when he first became a GL[[note]]While Kyle did make some attempts at re-forming the Corps, it was never successfully formed again until the start of Creator/GeoffJohns' run after Hal Jordan's resurrection.[[/note]], and Kyle's ring rarely spoke to him, if ever. He shouldn't know anything about Qward either, having not encountered the Weaponers that early in his career.

** Kyle Rayner's ring talks to him and welcomes him back to the Franchise/GreenLantern Corps, but the Corps did not exist when he first became a GL, and it rarely spoke to him, if ever. He shouldn't know anything about Qward either, having not encountered the Weaponers that early in his career.

** The summary of the events of ''Emerald Twilight'' is wrong. Hal didn't kill all the other Green Lanterns. He defeated them and took their rings, but he left them enough power to survive. And indeed, most of them turn up later on during Geoff John's run and are collectively known as the Lost Lanterns. Similarly, Hal didn't kill the Guardians either. They pooled their power and put everything they had into Ganthet, who created a ring for Kyle. Hal absorbed all the power of the central power battery into himself.

** Superwoman of Earth-3 is referred to as Lois Lane by several of her fellow Crime Syndicate members. Pre-Crisis Earth-3 ComicBook/LoisLane was a separate character from Superwoman and the wife of that reality's Lex Luthor, with the Superwoman of the Antimatter Crime Syndicate that was introduced in ''ComicBook/JLAEarth2'' being the one to have Lois Lane as her civilian name.

** Though the inconsistency could be excused somewhat by the story aiming for a more humorous and irreverent tone, the ''Supergirl: Matrix'' tie-in establishes Lord Volt and Lady Quark to resent each other with the heavy implication that it's because they're gay and have been forced into an ArrangedMarriage. This is in disregard of ''ComicBook/CrisisOnInfiniteEarths'' establishing Lady Quark as genuinely loving her husband and being upset about his death after she becomes the sole survivor of her world after it was wiped out from existence by the Anti-Monitor.

** Matrix is called Kara several times, even though that was never her name since not being Kara was her raison d'etre.
** Superwoman of Earth-3 is referred to as ComicBook/LoisLane by several of her fellow Crime Syndicate members. Pre-Crisis Earth-3 ComicBook/LoisLane was a separate character from Superwoman.

** The beginning of Issue 6 is baffling when it comes to the continuity of the main DCU. You have the Justice League talking to the Justice League United (which formed after ''ComicBook/ForeverEvil2013''). Okay. Telos, the planet, is being transported into the universe, which has drawn attention of several parties. You have the Oracle being from the Franchise/{{Superman}} books, Nix Uotan from ComicBook/TheMultiversity, and Darkseid taking notice. That's all fine. But you have Jediah Caul and K'rot from the short-lived ''Threshold'' book[[note]]which means this takes place before the finale of said book since Caul ''died'' at the end[[/note]], the Red Lanterns[[note]]which is impossible, since the Corps was slaughtered/depowered shortly after Kara left their ranks; with little time for her to join the JLU '''and''' happen before Atrocities and ''Godhead''[[/note]], and the ''freaking'' Guardians of the Universe[[note]]who are way beyond dead at this point, unless the Templar Guardians decided to take up their robes at this point... whenever this happens[[/note]]. [[MyFriendsAndZoidberg And Blue Beetle is there too, still stuck in space apparently.]] It also might have a continuity hiccup with itself, as the Barry Allen that ComicBook/{{Earth 2}} Jay Garrick meets implies he was grabbed after meeting Psycho-Pirate from ''Crisis On Infinite Earths'', which flies in the face of the Barry Allen from his own tie-in, who was taken when he first left the future to say hi to his friends, before he was set on his death course, and was stuck under a dome for a year.

* The entire existence of ComicBook/WonderGirl resulted from such an error. ''Comicbook/TeenTitans'' originated as a team-up of [[KidSidekick the major DC heroes' sidekicks]]. But it was completely forgotten by the writers that Wonder Girl ''wasn't'' Franchise/WonderWoman's sidekick, she was Wonder Woman herself as a teenager. When somebody remembered this fact, the {{retcon}} to explain it gave the Titans' version of Wonder Girl her own identity as Donna Troy and (eventually) [[ContinuitySnarl/DonnaTroy possibly the most convoluted history of any fictional character, ever]].

** [[http://comicboxcommentary.blogspot.com/2015/04/matrix-called-kara.html Matrix is called Kara by Lex]], even though Matrix was never called Kara, since her not being Kara was her reason to exist.

** ''ComicBook/Earth2'': The third and final volume ''Earth 2: Society'' has a few glaring discrepancies in continuity in regards to the first two volumes, the most notable ones being that the god that gave Jay Garrick his powers as the Flash is misidentified as Apollo rather than Mercury as well as Alan Scott's ring stated to be an Oan power ring that chose him to be the Green Lantern and Sinestro being mentioned as one of the supervillains who menaced Earth during the Age of Wonders, which contradicts the earlier volumes establishing that Alan Scott's ring was the engagement ring of his deceased boyfriend Sam Zhao and was chosen because an object was needed to focus the power of the Green, in addition to the previous volumes giving no indication that the Green Lantern Corps existed in this continuity.

* The entire existence of ComicBook/WonderGirl resulted from such an error. ''Comicbook/TeenTitans'' originated as a team-up of [[KidSidekick the major DC heroes' sidekicks]]. But it was completely forgotten by the writers that Wonder Girl ''wasn't'' Franchise/WonderWoman's sidekick, she was Wonder Woman herself as a teenager. When somebody remembered this fact, the {{retcon}} to explain it gave the Titans' version of Wonder Girl her own identity as Donna Troy and (eventually) [[ContinuitySnarl/DonnaTroy possibly the most convoluted history of any fictional character, ever]].''

** Captain Marvel is referred to as "Shazam" several times, despite the fact that his name was not changed to Shazam until the ComicBook/{{New 52}}.
** Both pre-Crisis [[Franchise/TheFlash Barry Allen and Jay Garrick]] refer to the Speed Force, something neither of them should have any knowledge of since the concept wasn't created until the post-Crisis Wally West Flash series. Barry's opponent, Tangent Comics Superman, mentions this.

** Kyle views Hal and Parallax as two separate entities. This is consistent with the Creator/GeoffJohns retcon that made Parallax a fear entity that possessed Hal, but before the retcon, Hal was Parallax. Note that the fear entity never appears or is referenced, and Hal's sanity while depowered is consistent with the post-Zero Hour zero issue of Green Lantern, so this may not be a continuity error so much as an attempt to remain mostly consistent with the past while keeping the retcon in mind.
** The summary of the events of Emerald Twilight is wrong. Hal didn't kill all the other Green Lanterns. He defeated them and took their rings, but he left them enough power to survive. And indeed, most of them turn up later on during Geoff John's run and are collectively known as the Lost Lanterns. Similarly, Hal didn't kill the Guardians either. They pooled their power and put everything they had into Ganthet, who created a ring for Kyle. Hal absorbed all the power of the central power battery into himself.

** Comicbook/{{Supergirl}} is wearing the wrong costume for her death scenes from ComicBook/CrisisOnInfiniteEarths. Also, her father Zor-El didn't work on the Phantom Zone projector.
** [[http://comicboxcommentary.blogspot.com/2015/04/matrix-called-kara.html Matrix is called Kara by Lex]].

** The ''Comicbook/LegionOfSuperheroes'' that battles Earth-4's Charlton heroes seems to be some weird mix of the post-Zero Hour Legion and the pre-Zero Hour temporal duplicates of the original Legion that wore very similar costumes (Batch [=SW6=], who starred in ''Legionnaires''). It includes the characters from ''Legionnaires'' who weren't duplicates of existing characters like Computo and Catspaw, neither of whom appeared in the reboot, but it also includes Timber Wolf and Princess Projectra, neither of whom were in ''Legionnaires'' (their [=SW6=] selves were killed during the Dominator war) and both of whom look like their reboot selves (particularly obvious in Jeckie's case, since it means she's a giant snake). Characters who were dead/radically altered by the end of the reboot aren't, and everyone with different costumes in the two versions is wearing the [=SW6=] version. Except Element Lad, who's wearing his pre-Zero Hour ''adult'' self's costume.

* In ''Comicbook/SupermanBrianMichaelBendis'', Daily Planet reporter Robinson Goode used to work for the Star City Sentinel. Problem - in the post-''Flashpoint'' DCU, there ''is'' no Star City; it was briefly used as a [[PleaseSelectNewCityName new name]] for Seattle in the ''Comicbook/GreenArrowRebirth'' storyline "Rise of Star City", but then it reverted back to being Seattle.

* In ''Comicbook/BrianMichaelBendisSuperman'', Daily Planet reporter Robinson Goode used to work for the Star City Sentinel. Problem - in the post-''Flashpoint'' DCU, there ''is'' no Star City; it was briefly used as a [[PleaseSelectNewCityName new name]] for Seattle in the ''Comicbook/GreenArrowRebirth'' storyline "Rise of Star City", but then it reverted back to being Seattle.

** The beginning of Issue 6 is baffling when it comes to the continuity of the main DCU. You have the Justice League talking to the Justice League United (which formed after ''ComicBook/ForeverEvil''). Okay. Telos, the planet, is being transported into the universe, which has drawn attention of several parties. You have the Oracle being from the Franchise/{{Superman}} books, Nix Uotan from ComicBook/TheMultiversity, and Darkseid taking notice. That's all fine. But you have Jediah Caul and K'rot from the short-lived ''Threshold'' book[[note]]which means this takes place before the finale of said book since Caul ''died'' at the end[[/note]], the Red Lanterns[[note]]which is impossible, since the Corps was slaughtered/depowered shortly after Kara left their ranks; with little time for her to join the JLU '''and''' happen before Atrocities and ''Godhead''[[/note]], and the ''freaking'' Guardians of the Universe[[note]]who are way beyond dead at this point, unless the Templar Guardians decided to take up their robes at this point... whenever this happens[[/note]]. [[MyFriendsAndZoidberg And Blue Beetle is there too, still stuck in space apparently.]] It also might have a continuity hiccup with itself, as the Barry Allen that ComicBook/{{Earth 2}} Jay Garrick meets implies he was grabbed after meeting Psycho-Pirate from ''Crisis On Infinite Earths'', which flies in the face of the Barry Allen from his own tie-in, who was taken when he first left the future to say hi to his friends, before he was set on his death course, and was stuck under a dome for a year.

* The ''Comicbook/LegionOfSuperheroes'' ''Comicbook/FinalCrisis'' tie-in ''Legion of Three Worlds'' mostly does a good job in keeping track of the Reboot, Threeboot, and Retroboot Legions. However, the flashback to their ForgottenFirstMeeting is meant to show the Legions as they were in their respective early days, and while it gets most of them right, it shows Reboot Brainiac 5 looking the same as he does in the "present"; short hair, Brainiac-logo forehead disks, and a costume with black sides and a purple front. In the early post-Zero Hour years he had shoulder lenghth hair, no disks, and his costume colours were reversed. And the scene also shows Kid Quantum I and Leviathan, who both died before Brainy got his cosmic makeover in ''LSH'' #104.

** In the version of ''ComicBook/BlackestNight'', it's stated that the reason things ended in the original story like they did is because Sinestro shared the White Lantern power -- except that's not what happened. What happened in the original story was Nekron ripped it from him and it was Hal who took it and shared it. Likewise, it treats the Black Lantern infection like a typical zombie plague and the members of the Black Lantern Corps as the actual person reanimated when in reality one usually becomes a Black Lantern with an existing member ripping out that person's heart and they're actually a soulless corpse posing as the original, not that person themself reanimated.

** The version of events in the ''ComicBook/DarkNightsMetal'' one-shot shows what'd happen if this went wrong -- only the premise as the normal DC multiverse meeting the Dark Multiverse for the first time -- but it's all the Dark Multiverse. That said, [[spoiler:the ending of ''Metal''[='=]s sequel ''ComicBook/DarkNightsDeathMetal'' turned the DC Multiverse into an Omniverse, so it's possible to reconcile that problem now.]]

* Ed Brubaker's run on ''ComicBook/{{Catwoman}}'' reintroduced Holly Robinson, Selina's room-mate and sex-work protegee from ''Batman: Year One'' and ''Her Sister's Keeper'', as her new sidekick. Unfortunately, Holly had previously been killed off, after being given completely different CharacterDevelopment as a mob wife, in a story from the ''Action Comics Weekly'' anthology series. Rather than make any attempt at {{Retcon}}, Brubaker simply acknowledged the error in a short LeaningOnTheFourthWall comedy piece included in the ''Catwoman: Secret Files and Origins'' one-shot. He admitted both in the piece and in interviews that he simply hadn't known about Holly's death, given the relative obscurity of the comic where it happened. The intervening ''ComicBook/ZeroHour'' CosmicRetcon provides an easy in-universe explanation for fans who really want one.

!!Franchise/TheDCU

** The version of events in the ''ComicBook/DarkNightsMetal'' one-shot shows what'd happen if this went wrong -- only the premise as the normal DC multiverse meeting the Dark Multiverse for the first time -- but it's all the Dark Multiverse. That said, [[spoiler:the ending of ''Metal''[='=]s sequel ''ComicBook/DarkNightsDeathMetal'' turned the DC Multiverse into an Omniverse, so it's possible to reconcile that problem now.]]