History Main / RetCanon

** It was Creator/MarlonBrando's idea to have Jor-El wearing a recognizable 'S' logo in the 1978 ''Film/{{Superman}}'' film, making it a preexisting Kryptonian emblem rather than merely a personal symbol of Superman. This change filtered into the comics awareness, explicitly finalized in the 2003 title ''SupermanBirthright''.

*** Technically the Thunder Hammer is not a two-handed weapon, you just can't get a bonus attack unless you have a pair (or in 6th edition, a Thunder Hammer and a Powerfist/Lightnig Claw), which no official model has. It just wasn't available for a Power Armoured HQ unit before the 4th edition codex.

** ''[[VideoGame/KirbySuperStar Super Star Ultra]]'' and ''Mass Attack'' started giving attention to Sword and Blade as Meta Knight's followers, most likely because they were in the anime (where Axe, Mace, Trident, and Javelin were nowhere to be seen). Also, in ''Super Star Ultra'', the Halberd was redesigned to resemble its ''Brawl'' appearance.

* The VideoGame/{{Kirby}} platformer ''Kirby Squeak Squad'', redesigned Dedede's palace to resemble the one from the [[Anime/KirbyOfTheStars anime adaptation]]. The room where Kirby fought Dedede even contained the monster summoning device from the series.
** Similarly, the GBA remake of Kirby's Adventure features the Fountain of Dreams from ''VideoGame/SuperSmashBros. Melee'', complete with its remixed stage music.

!!Examples

*** Rogue also lost her curls in favor of straight long hair similar to AnnaPaquin's.

** As a minor example, Rogue used to have a white SkunkStripe, across her head from front to back. Ever since the movies, only her front bangs have been white (even in ''{{X-Men Forever}}'', where her original hair style, at least at first, should have been retained).

** In the original comics, Iceman was a founding member of the team and about the same age as Comicbook/{{Cyclops}} and the other X-Men. The movie made him a teenage trainee who was significantly younger than the real X-Men, and this eventually carried over into ''Comicbook/UltimateXMen'', ''WesternAnimation/{{X-Men Evolution}}'', and ''WesternAnimation/{{Wolverine and the X-Men}}''.
** Circa 2005, Franchise/SpiderMan gained biological webshooting powers like those portrayed in his [[Film/SpiderMan eponymous 2002 movie]]. Continuing the trend, in 2007, the "Back in Black" storyline, wherein Spidey starts wearing the black costume again, echoes ''FIlm/SpiderMan3'', which is a retelling of the original black costume storyline.

** In the original Black Costume saga, the symbiote did not affect Peter's personality, at all. It just made him tired because it would take his body out crime fighting while he slept. The addition of it making him more violent and mean came from [[WesternAnimation/{{Spider-ManTheAnimatedSeries}} the '90s cartoon]].
** Harry Osborn being Peter's friend and classmate while in high school was something that originated in the ''Comicbook/UltimateSpiderMan'' comics. This development was imported to [[Film/SpiderManTrilogy the Sam Raimi films]], as well as ''WesternAnimation/TheSpectacularSpiderMan'' and ''WesternAnimation/{{Ultimate Spider-Man}}'' cartoons.

*** Amanda Waller is a lot slimmer, ala her appearance in ''Film/GreenLantern'' and ''{{Smallville}}.

*** During ''Flash: Rebirth'' Wally gained yet another new costume that was even more inspired by the live-action suit. It had the pointed, Batman-like nose and the darker color scheme, in addition to the aforementioned belt. The costume also added a logo similar to the one on Wally spotted in ''WesternAnimation/JusticeLeague''.

** When Comicbook/{{Vixen}} rejoined the Justice League after ''InfiniteCrisis'', she was now shown sporting her look from ''JusticeLeagueUnlimited''.

*** Amanda Waller is a lot slimmer, ala her appearance in ''Film/GreenLantern''.

** The Bullseye seen in ''[[Comicbook/{{Punisher}} PunisherMax]]'' had even more of the movie's influence. He not only had the scar, but also ran around in [[CivvieSpandex street clothes]] [[NotWearingTights as opposed to a costume]].
** The {{Ultimate|Marvel}} version of {{Elektra}} wears a black costume similar to that of her [[Film/{{Elektra}} movie]] counterpart.

For the more genegral application of changes to the work, see {{Retcon}}.

* In the same vein, John Le Carré stopped writing the novels built around George Smiley and the Circus in the early 1980s since, after several wildly popular TV adaptations, he kept seeing Alec Guinness when he wrote the character.

For the more general application of changes to the work, see {{Retcon}}.

[[folder:Radio]]
* In its original radio series incarnation, ''Franchise/TheGreenHornet'' posited no remarkable skills of The Hornet's valet, Kato. In particular, he was not characterized as either a skilled fighter in general or a martial arts master in particular. However, after the producers of the 1966 television adaptation cast Chinese martial arts master Creator/BruceLee as Kato, they used every chance they could to show off Lee's martial arts mastery in the series. The television characterization of Kato has been so influential that it is now probably mandatory that Kato be a skilled martial artist in any subsequent adaptation of the property. In the 1990s NOW Comics series of Green Hornet comics, all the Katos were skilled in martial arts, and rumors of various movie adaptations since the 1966 series have always mentioned some prominent martial arts star as having the inside track to being cast as Kato.
[[/folder]]

** MattFraction made the Thing Rings from ''FredAndBarneyMeetTheThing'' canon in ''Comicbook/FF''. Though in this case, they're used by Darla Deering rather than [[Comicbook/FantasticFour Ben Grimm]].

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** Harry Osborn being Peter's friend and classmate while in high school was something that originated in [[Film/SpiderMan the first movie]]. This development was imported to the ''Comicbook/UltimateSpiderMan'' comics, as well as ''WesternAnimation/TheSpectacularSpiderMan'' and ''WesternAnimation/{{Ultimate Spider-Man}}'' cartoons.

** The [[NormanOsborn Iron Patriot]] armor has returned to the Marvel Universe due to its use in ''Film/IronMan3''. It is used by Tony Stark in ''TheUltimates'' and by [[Comicbook/WarMachine James Rhodes]] in ''SecretAvengers''.

* ''DragonBall'': AkiraToriyama was so impressed with the TV special featuring Goku's father Bardock that he subsequently [[CanonImmigrant incorporated the character into the manga]] for a two-panel flashback to the ending of the special, earning both him and the special canon status. This makes Bardock the only anime-original character to be featured in the manga.
* Shortly after the ''{{Negima}}'' alternate universe adaptation introduced Armor Nodoka's ability to split her Diarium Ejus up to read multiple minds, the Nodoka of the manga gained this ability as well (though her version actually shrinks the books based on how many splits she's used).

* In TheDCU:
** Franchise/{{Batman}}'s BattleButler Alfred was originally drawn as a stout and clean-shaven man, but in 1944 he was dispatched to a health resort from which he would return thin and mustached so that he would resemble William Austin's portrayal in the 1943 serial. Also, he originally died in the comics but the 60's Creator/AdamWest series got him revived.
** It was MarlonBrando's idea to have Jor-El wearing a recognizable 'S' logo in the 1978 ''Film/{{Superman}}'' film, making it a preexisting Kryptonian emblem rather than merely a personal symbol of Superman. This change filtered into the comics awareness, explicitly finalized in the 2003 title ''SupermanBirthright''.
** The childhood of Clark Kent was changed once in response to the Movie with his powers developing gradually and no career as Superboy, and more recently it has changed again to become closer to the portrayal in ''{{Smallville}}'', including restoring Lex Luthor as a Smallville resident and friend of Clark (which, ironically, is what they had changed him ''from'' Post-Crisis).

*** Post-''Infinite'' Crisis, Krypton is even ''more'' like the movie version than it was post-Crisis. Superman's fortress is now the same crystalline structure seen in the films (and in ''{{Smallville}}''), complete with Jor-El hologram.
** Also, after the movie, many artists drew Superman resembling Christopher Reeve.

** In both the Golden and Silver Age, WonderWoman had the magic lasso -- which could compel total obedience from anyone caught in it. As one might imagine, she had it used on her pretty regularly. As this was regarded as a little squicky for television, the lasso's ability to compel was reduced to being able to force its captive to tell the truth. This is now so canon, TheOtherWiki doesn't even mention the original ability.
*** More recently, Wondie has started spinning around to change her clothes, a magical transformation used in the 1970's TV show, but not in the comics until twenty years later, when PromotedFanboy Phil Jimenez was writing & drawing the book.
** After 2001's ''JusticeLeague'' cartoon featured a Hawkgirl as a member, writer Joe Kelly chose to add the DC Universe's then-current Hawkgirl to the contemporary JLA (even though this was a different character, connected to the ''[[TheGoldenAgeOfComicBooks Golden Age]]'' Hawkgirl rather than the [[TheSilverAgeOfComicBooks Silver Age]] version from which the cartoon's heroine was adapted).
*** ''JusticeLeague'' also introduced the idea that John Stewart (''GreenLantern'') was an [[strike: ex-]]Marine, an idea that's since filtered into the comics.
**** John Stewart also returned to being an active Green Lantern and joined the League during Kelly's ''JLA'' run and started wearing the same costume he wore on ''JusticeLeague'' (sans gloves) and the same haircut the animated Stewart had in the first two seasons.
***** While John Stewart has yet to sport the "bald with goatee" look from the ''Unlimited'' seasons, [[MirrorUniverse Power Ring]] does sport a similar one, thanks in part to the events of ''[[{{JLA-Avengers}} JLA/Avengers]]'' destroying and rebuilding the Crime Syndicate's universe, giving him a RaceLift that changed him from a blonde Kyle Rayner counterpart into a counterpart for Stewart. Also after joining the post-''InfiniteCrisis'' incarnation of the League, John joked about Black Lightning's current bald look, then said he'd looked look good bald with a goatee.
** The ''WesternAnimation/TeenTitans'' cartoon debuted in the same month as a relaunch of the ''ComicBook/TeenTitans'' comic series. Both took inspiration from the classic 80s Marv Wolfman/George Perez "New Teen Titans" series, but it was also pretty obvious that DC was making their properties look similar across the board.
*** The cartoon team was composed of Robin, Starfire, Cyborg, Raven and Beast Boy. The comics team was composed of former ''ComicBook/YoungJustice'' members Robin, Superboy, Wonder Girl, and Kid Flash, with the 80s Titans Starfire, Cyborg, Raven and Beast Boy returning. The comics team thus superficially resembled the cartoon team - only with the former Young Justice members, most notably {{Robin}}, being [[LegacyCharacter Legacy Characters]] of the 80s Titans. At least some of the older Titans were not even teenagers by this point, having aged into their 20s. Notably, comics Raven, in spirit form before the relaunch, was given a new teenage body just for the series, and Gar Logan's codename, then Changeling, reverted to Beast Boy (despite being more like Beast ''Man'').

*** Bumblebee's [[{{Sizeshifter}} shrinking abilities]] were also introduced in the show, before being made canon in the comics after ''InfiniteCrisis''. Prior to that, she simply had a suit of PoweredArmor that resembled that of a bee.
*** A '90s Titan named Joto was revamped as "Hotspot" in the toon [[note]]due to "Joto" having a derogatory meaning for homosexuals in Spanish, though it means "heat" in Swahili[[/note]], and received flamethrower powers as opposed to simply using heat generation. After Infinite Crisis, the comic Joto inexplicably took on the flaming head look of his animated self, the "Hotspot" codename, and began using fire as an ability.

*** Based on the popularity of the animated series version of the ClockKing (Temple Fugate), a new Clock King with the same name and dress was introduced to TheDCU (though instead of AwesomenessByAnalysis powers, this version has actual precognitive abilities as well as a sadistic streak).

*** The series also introduced the idea of Bruce Wayne being childhood friends with {{Zatanna}}, which was later made canon in the comics by PaulDini after ''Infinite Crisis''. Prior to this, Batman had been portrayed as being ''much'' older than Zatanna. Only the later series ''WesternAnimation/YoungJustice'' has kept Zatanna younger, making her a peer of Robin.
** Superman flies because the Fleischer cartoons found it easier to animate flight than jumping. Simultaneously, [[Radio/TheAdventuresOfSuperman the radio show]] started depicting Superman flying so that they could fit plot exposition into scenes while he traveled place to place. However, the radio show avoided calling it flight. Most of his other powers came from the radio or cartoon shows, too. Initially, he was just as the opening sequence described him: faster than a speeding bullet, more powerful than a locomotive, and able to leap tall buildings in a single bound. Heat vision, super breath, and more were largely later additions.
*** Action Comics (DC) itself also gradually drifted toward flight due to artist mistakes. As artists depicted Superman performing more and more impossible maneuvers in midair, AC writers explained it away as his ability to change trajectory in midair. When Fleischer, who had followed the comics and radio show, asked point-blank if Superman could fly, AC gave up and said he could. It didn't become official though until a 1942 Superman novel written by the head writer of the radio show, where it explicitly stated Superman flew across the Atlantic ocean to stop a Nazi rocket missile. By 1943, Superman could fly 8 times the speed of light.

** Though General Zod already existed in the comics before and after ''Superman II'', his backstory became such a mess that eventually DC decided to make a "definitive" reboot of the character based on his most iconic version: that of the aforementioned film.

** When TheFlash got a TV series, a couple of small changes were made in the comic: Wally got a dog and a new costume with a symmetric belt like the one on the show. This was only fair since the TV Flash, while based primarily on Barry Allen, also borrowed elements from Wally (such as his post-Crisis need for huge amounts of food).

** {{Katana}} had always been more of a lower-tier, ensemble character, but her big role in ''WesternAnimation/BewareTheBatman'' lead to DC giving the character her own solo book, as well as a spot in the ''JusticeLeagueOfAmerica''.
** The ''BrightestDay'' and ''{{New 52}}'' versions of {{Firestorm}} were inspired by the character's portrayal in ''BatmanTheBraveAndTheBold''. While the Jason Rusch/Ronnie Raymond combo had shown up in the comics before, it was the TV show that established Jason as a ChildProdigy. Prior to that, he was mostly an average student who relied on Professor Stein to provide Firestorm's science knowledge.
** Despite ''SupermanTheAnimatedSeries'''s version of {{Supergirl}} being Kara In-Ze, a loose adaptation of Kara Zor-El, the then-current Supergirl in the comics, Linda Danvers was given the "white shirt, hot pants" Supergirl costume used in the series.
** ''[[WesternAnimation/BatmanTheAnimatedSeries The New Batman Adventures]]'', the sequel show to ''WesternAnimation/BatmanTheAnimatedSeries'' featured revamped designs for every character, in order to streamline the show's look to make it easier to animate on the smaller budget, as well as to make it more compatible stylistically with SupermanTheAnimatedSeries. Most of the new designs were poorly received (especially the Joker's), but one in particular that most people seem to like is Scarecrow's. It didn't look much like an actual Scarecrow (more like a western preacher), but it was pretty creepy (which is good considering fear is the Scarecrow's whole shtick). The staff liked the outcome, particularly since they'd fiddled around with different designs before and found them ineffective. Since TNBA, many versions of Scarecrow incorporate that version's distinctive hanged man's noose.
*** Two more from ''[[WesternAnimation/BatmanTheAnimatedSeries The New Batman Adventures]]''. Between the end of "[[BatmanNoMansLand No Man's Land]]" and the end of the events of "[[GrantMorrisonsBatman The Return of Bruce Wayne]]", Batman had returned to using the original/"[[ComicBook/BatmanYearOne Year One]]" costume, which was what the costume he wore in ''[=TNBA=]'' (and ''JusticeLeague'') was based on. Likewise, after the "One Year Later" TimeSkip after ''InfiniteCrisis'', Tim Drake donned a tweaked version of the costume he wore during ''TNBA''.
** As of the {{New 52}}...
*** Amanda Waller is a lot slimmer, ala her appearance in the ''Film/GreenLantern'' movie.
*** Commissioner Gordon had reddish-brown hair in the present day, ala his appearance in Film/TheDarkKnightSaga and Zsasz grew a beard like his appearance in ''Film/BatmanBegins''.

*** Etta Candy got a RaceLift ala her counterpart in the [[Series/WonderWoman2011Pilot failed]] ''[[Series/WonderWoman2011Pilot Wonder Woman]]'' [[Series/WonderWoman2011Pilot pilot]] and is now African-American.
*** Additionally, both Miss Martian and Sportsmaster have since been seen wearing their costumes from the ''WesternAnimation/YoungJustice'' animated series. [[note]]Although Miss Martian's cameo was later edited out of Teen Titans in the trade paperback version, due to some higher-up ExecutiveMeddling. The "stealth costume Miss Martian" has now been replaced by an unidentified blonde heroine.[[/note]]
*** Coincidence or not, some have also noted that Comicbook/HarleyQuinn's ''{{New 52}}'' design resembles the iteration of the character seen in the ''BatmanLive'' stage show and ''VideoGame/BatmanArkhamCity''.
*** The Tumbler from ''TheDarkKnightSaga'' has been made canon in ''DetectiveComics''.
* In the MarvelUniverse:
** Following the success of the ''Comicbook/{{X-Men}}'' [[Film/{{X-Men}} movie]] in 2000, the characters in the comics switched to dark leather costumes which more closely resembled those of the movie. Toad's markedly different appearance and advanced powers (a mostly regular-looking guy with a prehensile tongue and amazing acrobatic skills as opposed to a deformed hunchback who just jumps around a bit) was also copied in.
** As a minor example of this, Rogue used to have her white streak reach, skunk-like, across her head from front to back. Ever since the movies, only her front bangs have been white (even in ''XMenForever'', where her original hair style, at least at first, should have been retained).

*** Rogue also lost her curls in favor of straight long hair similar to Anna Paquin's.
** Greg Rucka and other artists showed Wolverine's claws coming from between his fingers as opposed to the backs of his knuckles. Also, like the Superman example, some artists have drawn Wolverine looking like Hugh Jackman.

** {{Magneto}}'s plastic prison from the movies was used in ''{{Ultimate X-Men}}''.
** It may shock people to learn that the idea of the Xavier Institute as an actual school was also something that came from the movies. Originally, the school aspect was more of a cover story than anything, and the only actual "students" were the X-Men themselves. Then the [[Film/XMen1 first movie]] came out and introduced the idea of the Institute as a real school with numerous mutant students, and GrantMorrison subsequently made the idea canon in the comics.
** Due to the popularity of ''Film/XMenFirstClass'', Marvel launched ''First X-Men'', a prequel series about an early incarnation of the team lead by Magneto and a not-yet-disabled Professor Xavier.
** Gambit's role in ''[[Film/XMenOriginsWolverine X-Men Origins: Wolverine]]'' lead to the ''Weapon X: First Class'' mini-series, which established that as a teen, Gambit was present at the Weapon X facility the night {{Wolverine}} made his fateful escape.
** In the original comics, Iceman was a founding member of the team and about the same age as Comicbook/{{Cyclops}} and the other X-Men. The movie made him a teenage trainee who was significantly younger than the real X-Men, and this eventually carried over into ''{{Ultimate X-Men}}'', ''XMenEvolution'' and ''WolverineAndTheXMen''.
** Circa 2005, Comicbook/{{Spider-Man}} gained biological webshooting powers like those portrayed in his [[Film/{{Spider-man}} eponymous 2002 movie]]. Continuing the trend, in 2007, the "Back in Black" storyline, wherein Spidey starts wearing the black costume again, echoes ''Spider-Man 3'', which is a retelling of the original black costume storyline.
** The supervillain Bullseye originally wore a costume with a mask that had a bullseye design on it. In the 2003 ''{{Daredevil}}'' movie, Bullseye dressed like a biker and had a bullseye scar directly on his forehead. Sometime later the comic book version received the scar as well, when an enraged Daredevil carved a bullseye into the forehead of his nemesis.

** The [[UltimateMarvel Ultimate]] version of {{Elektra}} wears a black costume similar to that of her movie counterpart.

** CaptainAmerica's sidekick, TheFalcon, briefly wore the same armored costume he wore in the short-lived ''TheAvengersUnitedTheyStand'' animated series. However, when he rejoined the Avengers a few years later, he ditched the threads.

** The idea of [[Comicbook/WarMachine James Rhodes]] and Pepper Potts as contemporary supporting characters was something introduced in the first [[Film/IronMan Iron Man movie]]. Up until that point, the characters had little interaction or relation in the comics. This also carried over into ''IronManArmoredAdventures'' and ''WesternAnimation/AvengersEarthsMightiestHeroes''.
** The comic version of ComicBook/{{SHIELD}} has since adopted the Avengers Initiative from the MarvelCinematicUniverse. The second volume of ''SecretAvengers'' sees S.H.I.E.L.D. using the Initiative to recruit its own team of superheroes, similar to the origin of the Avengers in the [[Film/TheAvengers live-action film]].
** {{Hawkeye}} now wears a black leather costume similar to the one he wears in the MarvelCinematicUniverse. The movie costume is itself inspired by the one seen in ''TheUltimates'', though the current mainstream outfit adds in some purple coloring.
** The [[NormanOsborn Iron Patriot]] armor has returned to the Marvel Universe due to its use in ''IronMan3''. It is currently used by Tony Stark in ''TheUltimates'' and by [[Comicbook/WarMachine James Rhodes]] in ''SecretAvengers''.
** Blade's original powers were being immune to vampire bites, aging slowly and nothing else. He later picked up enhanced senses but didn't really become super in any sense of the word until his film came out.
** [[Comicbook/TheIncredibleHulk The Hulk]]'s reintroduction into the Avengers was also motivated by the films. In the original comics, he quit after one issue, but the MarvelNOW relaunch has since seen him return to the team as a main character.

** In the original Black Costume saga, the symbiote did not affect Peter's personality, at all. It just made him tired because it would take his body out crime fighting while he slept. The addition of it making him more violent and mean came from [[SpiderManTheAnimatedSeries the '90s cartoon]].
** Harry Osborn being Peter's friend and classmate while in high school was something that originated in [[Film/SpiderMan the first movie]]. This development was imported to the ''Comicbook/UltimateSpiderMan'' comics, as well as ''WesternAnimation/{{The Spectacular Spider-Man}}'' and ''WesternAnimation/{{Ultimate Spider-Man}}'' cartoons.

** As the ScottPilgrim film (''ScottPilgrimVsTheWorld'') had been in development since the release of Volume 1 (of 6), elements from the script (and interactions with screenwriters EdgarWright and Michael Bacall) were incorporated by creator Bryan Lee O'Malley into subsequent volumes, per his own confessions. Much of Volume 6 was written during and directly after filming of the movie adaptation, meaning Jason Schwartzmann's portrayal of Gideon had been filmed while O'Malley's conception of the character was in flux, thus influencing the character's depiction in the graphic novel. Furthermore, some shots originating in the film's climax (the elevator with a downward arrow indicating its direction; the overhead angle of Scott [[spoiler:dead]] on the floor) were directly incorporated into Volume 6. O'Malley has also stated that certain gags (such as the lines "It was just a [bisexual] phase," "You had a sexy phase!?") originated in the film's screenplay and were adapted into the graphic novels with permission, and that certain scenes were inspired by trips O'Malley took around Toronto with Wright and Bacall (such as the Honest Ed's sequence from Volume 3, which apparently came from Wright and Bacall's genuine shock and confusion once they entered the store, and horror upon seeing a particularly grotesque wall-mounted deer-head clock).
* A minor one from ArchieComics. In the early Sabrina comics, Aunt Hilda & Zelda were an old crone & a chubby green-haired woman, respectively. Around the time of the TV show, they were changed into attractive middle-aged women.

* Peter Jackson's adaptation of TheLordOfTheRings has probably settled for all time the fan arguments over the color of Legolas' hair. He's blond.

* The live-action GIJoe film [[RaceLift recast]] Ripcord (formerly a redheaded white guy) as black. Since then, Ripcord has been introduced in two new continuities - the [[GIJoeIDW IDW comicbooks]] and the ''GIJoeRenegades'' cartoon - and in both of them he's a young black man.

* Creator/JKRowling mentioned in an interview that after she saw the first ''Film/HarryPotter'' movie, her own mental image of Snape changed to resemble Creator/AlanRickman, which would then affect the way he's described in the later books.
** This applied to the chapter illustrations in the American versions as well. ''Prisoner of Azkaban'' and ''Order of the Phoenix'' had portraits of Snape as balding and with a goatee, but ''Half Blood Prince'' showed him with long black hair and no facial hair, just like in the movies.
* Similarly, both Colin Dexter (''InspectorMorse'') and Ruth Rendell (''InspectorWexford'') have said their mental images of their detectives were dramatically affected by the TV adaptations.

* Thomas Harris has been quoted as saying this is exactly why he never watched the movie adaptation of his novel ''Literature/TheSilenceOfTheLambs''; not because he disapproved of it, but because he didn't want AnthonyHopkins' portrayal of Hannibal Lecter shading the character's portrayal in the sequels.
* This is also Creator/TerryPratchett's official reason for not reading ''Literature/{{Discworld}}'' FanFiction, along with the legal ramifications that can come with an unintentional (or coincidental) RetCanon.

* In the early ''{{Sharpe}}'' novels, Sharpe is a Londoner. Following the TV series, later books reveal he fled to Yorkshire as a teenager, where he presumably picked up SeanBean's accent.
* After ''Film/DrNo'' was released and made ridiculous amounts of money for all involved, IanFleming gave Literature/JamesBond Scottish ancestry (rather ironic, considering he considered SeanConnery a bad choice for the role at first).
* In Craig Thomas' novel ''Firefox'', the titular fighter craft was originally nothing more than a [=MiG=]-25 Foxbat augmented with state of the art technology. After ClintEastwood's 1982 [[{{Firefox}} movie adaptation]] came out with its iconic [[CoolPlane superfighter design]], subsequent republishing of the novel would use the movie version of the Firefox to depict the craft. In addition, Thomas changed the description of the plane in the sequel novel ''Firefox Down'' to match the new appearance.

** Robert Muldoon is about the only character who survived in the book and died in the movie without being killed off. He doesn't make an appearance (or is even mentioned aside from namedropping of all the survivors)in the sequel, tho.
* Other than the basic premise of "cartoon characters are real and live side-by-side with humans" and four important characters (Eddie Valiant, Roger and Jessica Rabbit, and Baby Herman), there are almost no similarities between the book ''WhoCensoredRogerRabbit?'' and the movie ''Film/WhoFramedRogerRabbit''. However, the author liked the movie much more than he'd liked his own novel, and when he wrote a sequel, ''Who Plugged Roger Rabbit?'', he followed up the movie's continuity, not the book's (which was even {{handwave}}d away as being AllJustADream).

* The original "Literature/SnowWhiteAndTheSevenDwarfs" fairy tale does not have her being awakened by a kiss; that was an addition by [[Disney/SnowWhite Disney]]. It's rare to see a "Snow White" adaption that doesn't include it now, even ones that attempt to go back to the Creator/BrothersGrimm story.

* ''Series/MightyMorphinPowerRangers'' originally had Zordon existing in an limbo dimension, with the tube he spoke out of being only his form of communication. ''Film/MightyMorphinPowerRangers'' TheMovie had Zordon being physically in the tube in a pocket dimension and capable of being killed by rupturing that tube. In ''Series/PowerRangersTurbo'' (about two years after the first movie) Zordon was magically brought to the physical tube in a pocket dimension, allowing him to return to his homeworld and exist in a state similar to the movie, and in fact became a major plot element of ''Series/PowerRangersInSpace'' where Zordon is captured.
** Speaking of homeworld, Power Rangers: The Movie had Lord Zedd Acknowledge that Zordon's home planet is Eltar, something that was never mentioned in the show. Since then, Eltar was mentioned in a few post-MMPR seasons.

* Johnny Cash's version of NineInchNails' ''Hurt''. Trent Reznor himself even said:

* BobDylan in concert tends to perform JimiHendrix's cover of his song "All Along the Watchtower".
* Billy Joel likes Garth Brooks' version of ''Shameless'' so much that he lets Garth come out and sing it when he gives a concert.
* Noel Gallagher of {{Oasis}} went through a phase of doing Music/RyanAdams' cover of "Wonderwall", most notably on his solo and acoustic tours.

* Robert Smith, singer and guitarist for Music/TheCure, enjoyed DinosaurJr's cover of "Just Like Heaven" so much that it has drastically influenced the way that The Cure play the song in concerts.

* In its original radio series incarnation, ''Franchise/TheGreenHornet'' posited no remarkable skills of The Hornet's valet, Kato. In particular, he was not characterized as either a skilled fighter in general or a martial arts master in particular. However, after the producers of the 1966 television adaptation cast Chinese martial arts master BruceLee as Kato, they used every chance they could to show off Lee's martial arts mastery in the series. The television characterization of Kato has been so influential that it is now probably mandatory that Kato be a skilled martial artist in any subsequent adaptation of the property. In the 1990s NOW Comics series of Green Hornet comics, all the Katos were skilled in martial arts, and rumors of various movie adaptations since the 1966 series have always mentioned some prominent martial arts star as having the inside track to being cast as Kato.

* ''TabletopGame/{{Warhammer 40000}}'' didn't even ''have'' two-handed Thunder Hammers before ''DawnOfWar'' gave one to its Force Commander.
*** Technically the Thunder Hammer is not a two-handed weapon, you just can't get a bonus attack unless you have a pair (or in 6th edition, a Thunder Hammer and a Powerfist/Lightnig Claw), which no official model has. It just wasn't availeable for a Power Armoured HQ unit before the 4th edition codex.

* After the ''PiratesOfTheCaribbean'' movies became popular, references to the characters were added to the original Disney World ride, along with several animatronic appearances of Captain Jack Sparrow. The latter are particularly jarring, as all of the original characters are cartoony caricatures of human beings, but Jack is a perfect likeness of JohnnyDepp's character (although Depp himself may be sufficiently cartoony to justify this).

* ''MortalKombat'''s Kano was originally American raised in Japan, but after the [[Film/MortalKombat first (surprisingly good) film]], Trevor Goddard's Australian interpretation was sufficiently well received for him to become an Aussie in the games. Just to complete the mess, Goddard was actually a Londoner who spent his entire life acting as an Australian in order to fill a gap in the Hollywood market. Other elements of the movie which made the cut for the games are the importance of winning ten tournaments, Kitana as Liu Kang's {{Love Interest|s}}, and Johnny Cage and Goro's rivalry.

** Also, [[PhysicalGod Raiden]] in later games seems to be heavily influenced by Christopher Lambert's portrayal in the movies, specifically his [[WhiteHairedPrettyBoy long white hair]], his [[DeadpanSnarker dry sense of humor]], and the fact that he is forbidden from directly interfering in the tournament.

** To a degree. It overlaps with AscendedMeme as well. In ''F-Zero GX'', the song that played during the credits reel when you completed Story Mode [[http://www.youtube.com/watch?v=f1XW1Y1Tu5A#t=1m5s mentioned the]] [[MegatonPunch Falcon Punch]], hinting that it was one of his canon abilities (his other ''SSB'' moves are left up in the air). In ''[[TheAnimeOfTheGame Falcon Densetsu]]''[=/=]''[[FourKidsEntertainment GP Legend]]'', Falcon [[http://www.youtube.com/watch?v=FFtw7qW7Vcw gets to finally]] [[MemeticMutation show his moves]] during the GrandFinale [[spoiler:[[DyingMomentOfAwesome and goes out in a blaze of glory]].]]

** ''Pokemon Yellow'' is ''Red'' and '''Blue'' altered to match the anime. Pikachu is the starter, Jessie and James appear regularly, the Pokemon designs reflect their TV appearances (rather than the OffModel, NightmareFuel-inducing original sprites), and the main Team Rocket mons are uncatchable (because Ash would never [[JustForPun catch 'em]]). Surprisingly, one of the uncatchable mons is Weedle, which Ash attempted to catch in the anime.

*** Misty obtains Togepi in anime. Misty has a Togetic in games. Togepi evolves in anime.
* SilentHillHomecoming takes many of its visual cues from the film adaptation (which the fans HATE). This is one of the reasons why it's considered the scrappy of the franchise.

* The idea of pairing Luigi and Daisy might be the only plot element from the ''Film/SuperMarioBros'' movie that was actually adapted into the video games (Though [[RepetitiveName "Mario Mario"]] and "Luigi Mario" has popped up in [=NoA=] made media). In her debut in ''VideoGame/SuperMarioLand'', Daisy was simply a Peach {{expy}} for that game and it wasn't until the later ''VideoGame/MarioParty'' and Sports games that the idea of having her as Luigi's love interest came about.
** Additionally, Luigi's cowardice originally was introduced in the cartoon spinoff ''TheSuperMarioBrosSuperShow''.

** The real reason of this may not be RetCanon (simply convenience for the artists of the scene), but Guile's intro in ''VideoGame/StreetFighterIV'' shows him holding Charlie's dog tags, on which the name "Charlie Nash" is written ('Charlie' is his name in western territories, while 'Nash' is his name in Japan). While the true use of this probably is to avert having to redraw the scene for Japanese audiences, the name 'Charlie Nash' is a common {{Fanon}} name as well as the name given to Charlie in UDON's comic book series (which is how it fits into this trope).
* The ''WorldsOfPower'' series of children's books based on [=NES=] games ended up affecting two games' sequels.
** "Kal Torlin", which was the name of the land where ''{{Shadowgate}}'' took place, was first used in ''Before Shadowgate'' and ended up used in ''Shadowgate 64''.

* ''TransformersAnimated'' has a group called the [[PraetorianGuard Cybertron Elite Guard]] serving as the commanding military and security force for the Autobots. Then, the [=BotCon=] 2009 theme was about a similar group (with the same winged Autobot insignias) set in [[TransformersWingsOfHonor G1 continuity]] called the ''Cybertronian'' Elite Guard. The Elite Guard are also in ''Prime,'' with Smokescreen having once been a member.

** ''WesternAnimation/TransformersPrime'' shows heavy influence from the ''TransformersFilmSeries'' including the general appearance of Optimus Prime, Bumblebee and Megatron, as well as Bumblebee's muteness (although he now speaks in generic beeps and tones instead of talking using clips from his radio). Many fans have described the aesthetics of the robots as a mix of Movie-style and Animated-style.

** Prime also follows in the footsteps of ''Exodus'' lately, incorporating bits from across franchise history. [[TransformersCybertron Four key macguffins that go into an "Omega Lock"]]?

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** Harry Osborn being a Peter's friend and classmate while in high school was something that originated in [[Film/SpiderMan1 the first movie]]. This development was imported to the ''Comicbook/UltimateSpiderMan'' comics, as well as ''WesternAnimation/{{The Spectacular Spider-Man}}'' and ''WesternAnimation/{{Ultimate Spider-Man}}'' cartoons.

** The [[NormanOsborn Iron Patriot]] armor has returned to the Marvel Universe due to its use in ''IronMan3''. It is currently used by Tony Stark in ''TheUltimates'' and as a drone in ''SecretAvengers''.

*** PeterDavid, however, will take any opportunity to point out that he introduced organic webshooters to the Spider-man mythos with ''Spider-Man 2099''.
*** Technically, Stan Lee was the first person to do that since he originally wanted to have Spider-Man shoot webs but thought it would seem repulsive to 60's audiences. He ended up turning him into a science whiz instead. Also, Venom's symbiote spun organic webs so the concept has been present in the spider-mythos long before Spidey 2099.

*** Another DC comic story, "The Sword of Superman" had an ancient, cosmic sword implant the idea into Martha Kent's head to sew the S symbol, the same one depicted on the sword's hilt, onto the Superboy costume.
**** It also inspired Jor-El and Lara to name their son Kal-El (meaning "Star Child" in ancient Kryptonese).

** The comic version of {{SHIELD}} has since adopted the Avengers Initiative from the MarvelCinematicUniverse. The second volume of ''SecretAvengers'' sees S.H.I.E.L.D. using the Initiative to recruit its own team of superheroes, similar to the origin of the Avengers in the [[Film/TheAvengers live-action film]].

** The idea of [[Comicbook/WarMachine James Rhodes]] and Pepper Potts as contemporary supporting characters was something introduced in the first [[Film/IronMan Iron Man movie]]. Up until that point, the characters had little interaction or relation in the comics. This also carried over into ''IronManArmoredAdventures'' and ''ComicBook/AvengersEarthsMightiestHeroes''.

*** Etta Candy got a RaceLift ala her counterpart in the failed ''Wonder Woman'' pilot and is now African-American.

*** The series also introduced the idea of Bruce Wayne being childhood friends with {{Zatanna}}, which was later made canon in the comics by PaulDini after ''Infinite Crisis''. Prior to this, Batman had been portrayed as being ''much'' older than Zatanna.

** Despite ''SupermanTheAnimatedSeries'''s version of {{Supergirl}} being Kara In-Ze, a loose adaptation of Kara Zor-El, the then-current Supergirl in the comics, Linda Danvers was given the Supergirl costume used in the series.

** {{Magneto}}'s plastic prison found its way into the ''{{Ultimate X-Men}}''

** The movie version of the Chitauri ([[InNameOnly who were almost nothing like]] the Chitauri from ''TheUltimates'') are also migrating to the mainstream Marvel Universe as enemies of Comicbook/{{Nova}}.

*** There's also each Turtle having a different colored mask rather than all of them wearing red masks, introduced in the cartoon and toyline and now used in all forms of continuity. Even the comics have them using it now.