History CanonImmigrant / TheDCU

* The final issue of ''ComicBook/DarkCrisis'' introduces the Council of Light, the comics version of ''WesternAnimation/YoungJustice2010'''s primary antagonistic faction, the Light, right down to the initial depiction of the group as seven anonymous silhouettes of light. However, ''ComicBook/SupermanHouseOfBrainiac would subsequently reveal that their members are [[spoiler:seven multiversal incarnations of Brainiac, these being the Prime Earth incarnation, the Franchise/DCAnimatedUniverse incarnation, the Milton Fine incarnation, the Pre-Crisis incarnation, the Pre-Flashpoint Vril Dox incarnation, Brainiac 13, and the ''ComicBook/FuturesEnd'' incarnation, rather than Vandal Savage, Ra's al Ghul, Lex Luthor, Queen Bee, Ocean Master, Brain, and Klarion the Witch Boy like in the show]].

* The final issue of ''ComicBook/DarkCrisis'' introduces the Council of Light, the comics version of ''WesternAnimation/YoungJustice2010'''s primary antagonistic faction, the Light, right down to the initial depiction of the group as seven anonymous silhouettes of light.

** Drusilla, the CanonForeigner ComicBook/WonderGirl from the [[Series/WonderWoman live-action show]], appeared as her sidekick.

* ''The New Golden Age'' introduces John Henry, the hammer-wielding Black vigilante from ''ComicBook/DCTheNewFrontier'', into the history of the mainline DC Universe. Both his backstory and eventual murder at the hands of TheKlan remain intact, but with the added wrinkle that the young boy seen at his tombstone at the end of the original story eventually went on to become a teen vigilante called John Henry Jr., who appears as one of the missing {{Legacy Character}}s in the subsequent ''ComicBook/StargirlTheLostChildren'' mini-series.

** The aforementioned additions of Billy & See-More also add another immigrant of sorts. In that same issue, the Titans battle a version of Fearsome Five containing regular members Gizmo, Mammoth & Jinx, with Billy & See-More added in. In other words, this is technically the first official DC comics appearance of "the H.I.V.E Five," (who were based on the Fearsome Five) the Titans' rivals from the series.

** KC Superman, Batman and Wonder Woman once came to the past to meet their mainstream counterparts, while the KC [[Comicbook/TeenTitans Titans]] also met their present day DC predecessors. Now it's an alternate earth where the events happened concurrent to our present.

** Red Robin was a uniform and code name introduced on an older Dick Grayson in ''Kingdom Come''. In the main continuity, [[ComicBook/RedHood Jason Todd]] briefly began using the name and suit in ''[[ComicBook/CountdownToFinalCrisis Countdown]]'' and shortly afterwards [[ComicBook/Robin1993 Tim Drake]] picked it up as his [[ComicBook/RedRobin new permanent superhero identity]].
** Wally West's daughter Iris, the Kid Flash of the ''Kingdom Come'' universe, was brought into the mainstream canon during Creator/GeoffJohns' ''Flash'' run, albeit using the nickname "Irey" to differentiate her from her great aunt. However, as the DCU already had its own Kid Flash at the time (Bart Allen), Irey eventually adopted the costumed identity of Impulse instead. Eventually, when Wally travels to the future, he meets the adult version of Irey who sports the exact same costume as the KC version, just with long hair. KC Wally's other child, Barry, was also adapted, albeit with [[AdaptationNameChange his name changed to Jai]], with black hair rather than KC Barry's blonde, and Jai doesn't have superspeed.

** Cinderblock and Billy Numerous were created for the show before appearing in the comics. The 2023 ''Comicbook/{{Cyborg}}'' series from ''Comicbook/DawnOfDC'' would also bring See-More and Atlas into the DCU.

** ''Comicbook/{{Cyborg}}'' (2023) #3 adds A.T.L.A.S. from the ''WesternAnimation/TeenTitans'' episode "Only Human" to the DCU. Interestingly, he's introduced as someone Cyborg has fought in the past, with his description of A.T.L.A.S.'s motivations suggesting their previous encounter wasn't totally dissimilar to the episode.

* Isis from the TV series ''[[Series/TheSecretsOfIsis Secrets of Isis]]'' was introduced as an inhabitant of [[ComicBook/{{Shazam}} Captain Marvel's]] world of Earth-S, back in the days of the [[ComicBook/CrisisOnInfiniteEarths original multiverse.]] Decades later, the series ''ComicBook/FiftyTwo'' features a version of the character as a probationary member of the Marvel Family, [[spoiler:though she meets her end in Week Forty-Four. She gets resurrected by Felix Faust in a later miniseries]].

** The ComicBook/WonderTwins were brought into the DC Universe as members of the ''Comicbook/JusticeLeagueInternational'' spinoff group ''Extreme Justice'', and subsequently became reserve members of ''ComicBook/YoungJustice''. The Wonder Twins finally received [[Creator/WonderComics their first series]] in 2019, which also saw the official DCU debut of Gleek, their pet monkey from the cartoon.

* The Protector originated in the animated ''ComicBook/TeenTitans'' anti-drug [[PublicServiceAnnouncement PSA]] from TheEighties, and has since appeared in a few cameos in the comics, including in ''ComicBook/HeroesInCrisis'' [[spoiler: where he was one of the murdered heroes]]. He also showed up in ''ComicBook/TeenTitansGo'' and ''ComicBook/TinyTitans''.

** Persephone, one of the Amazons from the ''{{WesternAnimation/Wonder Woman|2009}}'' animated movie, appeared in several issues of Creator/GailSimone's ''ComicBook/WonderWoman'' ''[[ComicBook/WonderWoman2006 Vol 3]]'' run. This was likely due to Simone having written an early draft of the film's script.

* Partial example: Tommy Merlyn was introduced to the ComicBook/New52 ''ComicBook/GreenArrow'' shortly after ''Series/{{Arrow}}'' started. The timing and new first name can't be accidental, though the dark archer known ''only'' as Merlyn has long been a foe of GA. In the end, ''Arrow's'' Tommy Merlyn [[spoiler: isn't the villain we know and love. His father, ''Malcolm'' Merlyn, is the BigBad of season one.]]

* ''The New Golden Age'' introduces John Henry, the hammer-wielding Black vigilante from ''Comicbook/DCTheNewFrontier'', into the history of the mainline DC Universe. Both his backstory and eventual murder at the hands of TheKlan remain intact, but with the added wrinkle that the young boy seen at his tombstone at the end of the original story eventually went on to become a teen vigilante called John Henry Jr., who appears as one of the missing {{Legacy Character}}s in the subsequent ''Comicbook/StargirlTheLostChildren'' mini-series.

* The 2022 ''Comicbook/BlueBeetle: Graduation Day'' limited series introduced Victoria Kord from the live-action ''Film/{{Blue Beetle|2023}}'' movie into the official DC continuity. Like the Batgirl and Aqualad examples, this occurred ''before'' the release of the film due to the comparatively lengthy production cycle of most movies. The Green Beetle scarab from ''WesternAnimation/YoungJustice'' also makes its DCU debut in the mini-series.
* The ''Comicbook/LazarusPlanet'' prelude to ''Comicbook/UnstoppableDoomPatrol'' introduces some new alternate personalities for Crazy Jane. One of them is Chainsaw Nun, based on an alter seen in the Underground in ''Series/DoomPatrol2019''.

** The sentient space cruiser Aya was introduced in the ''ComicBook/GreenLantern'' comics just prior to the ''ComicBook/New52''. Aya was created for the show but like Batgirl and Aqualad, appeared in the comics first. She also showed up in the ''Series/{{Smallville}}: Season 11'' comics.

* The sentient space cruiser Aya was introduced in the ''ComicBook/GreenLantern'' comics just prior to the ''ComicBook/New52''. Aya was created for ''WesternAnimation/GreenLanternTheAnimatedSeries'', but like Batgirl and Aqualad, appeared in the comics first. She also showed up in the ''Series/{{Smallville}}: Season 11'' comics.

* ''Comicbook/{{Cyborg}}'' (2023) #3 adds A.T.L.A.S. from the ''WesternAnimation/TeenTitans'' episode "Only Human" to the DCU. Interestingly, he's introduced as someone Cyborg has fought in the past, with his description of A.T.L.A.S.'s motivations suggesting their previous encounter wasn't totally dissimilar to the episode.

* The '' Comicbook/BlackManta'' miniseries brought Devil Ray, an {{expy}} of the title character created for ''WesternAnimation/JusticeLeagueUnlimited'' thanks to the ''Mercy Reef'' pilot, into the DC Universe, leading to ExpyCoexistence.

* ''The New Golden Age'' introduces John Henry, the hammer-wielding Black vigilante from ''Comicbook/DCTheNewFrontier'', into the history of the mainline DC Universe. Both his backstory and eventual murder at the hands of TheKlan remain intact, but with the added wrinkle that the young boy seen at his tombstone at the end of the original story eventually went on to become a teen vigilante called John Henry Jr., who appears as one of the missing {{Legacy Character}}s in the subsequent ''Comicbook/{{Stargirl}}: The Lost Children'' mini-series.

* The 2022 ''Comicbook/BlueBeetle: Graduation Day'' limited series introduced Victoria Kord from the live-action ''Film/BlueBeetle'' movie into the official DC continuity. Like the Batgirl and Aqualad examples, this occurred ''before'' the release of the film due to the comparatively lengthy production cycle of most movies. The Green Beetle scarab from ''WesternAnimation/YoungJustice'' also makes its DCU debut in the mini-series.

** Cinderblock and Billy Numerous were created for the show before appearing in the comics. The 2023 ''Cyborg'' series from ''Comicbook/DawnOfDC'' would also bring See-More into the DCU.

* The fifth issue of ''Static: Season One'' features the first appearance of Shiv, Talon and Onyx from ''WesternAnimation/StaticShock'', as well as cartoon-based versions of Puff and D-Struct. The sixth issue also has a cameo appearance of [[ArchEnemy Ebon]]. The African superhero Anansi would subsequently make his comic debut in a special one-shot in 2023.

** Wally West's daughter Iris, the Kid Flash of the ''Kingdom Come'' universe, was brought into the mainstream canon during Creator/GeoffJohns' ''Flash'' run. However, as the DCU already had its own Kid Flash at the time (Bart Allen), Iris eventually adopted the costumed identity of Impulse instead. Her brother Barry was also adapted, albeit with [[AdaptationNameChange his name changed to Jai]] due to the twins getting a RaceLift.

** Cinderblock and Billy Numerous were created for the show before appearing in the comics.

* The fifth issue of ''Static: Season One'' features the first appearance of Shiv, Talon and Onyx from ''WesternAnimation/StaticShock'', as well as cartoon-based versions of Puff and D-Struct. The sixth issue also has a cameo appearance of [[ArchEnemy Ebon]].