History Main / CanonMarchesOn

* ''Fanfic/ServiceWithASmile'':
** Adam Taurus is an AdaptationalNiceGuy, which was an intentional change, but it was done before Adam went ''[[{{Yandere}} completely psycho]]'' in volume 6. The author admits he probably wouldn't have bothered making him nice if he had known. Adam is also able to take off his mask and blend in, while in canon [[spoiler:there's a large brand over his left eye]].
** Adam tells Blake that no one in the White Fang really noticed when she disappeared; she wasn't particularly high-ranking, and those who remembered her just assumed she died on a mission. Canon soon revealed that not only was she a high-ranking member of Adam's White Fang, but she was the daughter of the original founder. ''Everyone'' noticed when she disappeared.

This usually happens because the creator is unaware of the spinoff material (after all, it may have faded into obscurity during the SequelGap) or because they have deliberately chosen to [[CanonDiscontinuity retcon the spinoff out of existence]], or there was simply miscommunication between the creator and the tie-in writers.

* ''Literature/TheLionKingSixNewAdventures'' was a series of licensed book sequels based off of ''Disney/TheLionKing''. They starred Simba's son Kopa and gave info on things like Simba's grandparents and Scar's youth. Come the direct-to-video sequel ''Disney/TheLionKingIISimbasPride'' and Kopa has been replaced with a daughter named Kiara.

[[Folder: Fan Fic]]

** A great example is the VERY FIRST ''EU/Legends'' fiction, the novel ''Literature/SplinterOfTheMindsEye'', which was published between ''Film/ANewHope'' and ''Film/TheEmpireStrikesBack''. It was intended as a possible TV Movie canon sequel by Lucas in the event that ''Film/ANewHope'' didn't pan out. Among other things; Luke and Leia are implied to have a budding romantic/sexual relationship.

* ''Literature/TheJournalOfTheTwoSisters'' is a companion book for ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' written by one of the show's writers. The canonicity of the book has been pulled into question due to errors with later episodes of the show. For example, the book states that other alicorns existed in the past and it's heavily implied Celestia and Luna were born alicorn. Season 6's "The Crystaling" implies that Flurry Heart is the first alicorn ever born in Equestria. The book's writer - who doesn't work on the show anymore - tries to handwave this as [[ExactWords the sisters being born before Equestria]]. The episode "Shadow Play" also strongly counters the book by depicting the [[spoiler:Tree of Harmony]] as younger than the book does.

[[folder:Video Games]]
* ''VideoGame/DoubleOhSevenLegends'', which is a tie-in to ''Film/{{Skyfall}}'', features a level loosely based on the film ''Film/OnHerMajestysSecretService'', where Daniel Craig's incarnation of James Bond meets and confronts Ernst Stavro Blofeld. [[spoiler: Guess who Craig!Bond ends up meeting for the first time in [[Film/{{Spectre}} the next film]] after ''Skyfall''?]]

[[folder: Inter-Media]]

[[folder: Comic Books]]

[[folder: Film]]

* ''WesternAnimation/Incredibles2'' is a direct sequel to ''WesternAnimation/TheIncredibles'', and ignores any other follow ups to the latter (like the [[ComicBook/TheIncredibles comic book series]] and the videogame ''Rise of the Underminer''.

[[folder: Video Games]]

[[folder: Western Animation]]

But then from out of nowhere, the creator decides to produce their official follow-up, which flat-out contradicts what happened in the spinoff material. Looks like the writer of that one tie-in book was too hasty with killing that seemingly unimportant character. Or the film adaptation made a mistake in hindsight about cutting that one scene that turned out to be a SequelHook.

Compare SeriesContinuityError, where two or more installments of the same branch of a franchise unintentionally contradict each other. See also EarlyInstallmentWeirdness and ContinuitySnarl. Often results in CharacterizationMarchesOn when a character from the original work ends up behaving differently in the followup than they are depicted in the spinoffs. Not to be confused with SchrodingersCanon, where there's still a chance that the spin-off in question might be considered canon. The {{Fanon}} counterpart to this trope is OutdatedByCanon, and for mere fan ''theories'' it's {{Jossed}}. Contrast with OvertookTheManga for when an adaptation moves past the original source and has to come up with as solution.

Compare SeriesContinuityError, where two or more installments of the same branch of a franchise unintentionally contradict each other. See also EarlyInstallmentWeirdness and ContinuitySnarl. Often results in CharacterizationMarchesOn when a character from the original work ends up behaving differently in the followup than they are depicted in the spinoffs. Not to be confused with SchrodingersCanon, where there's still a chance that the spin-off in question might be considered canon. The {{Fanon}} counterpart to this trope is OutdatedByCanon. Contrast with OvertookTheManga for when an adaptation moves past the original source and has to come up with as solution.

But then from out of nowhere, the creator decides to produce their official follow-up, which flat-out contradicts what happened in the spinoff material. Looks like the writer of the novelization was too hasty with allowing that seemingly unimportant character to suffer from DeathByAdaptation. Or the film adaptation made a mistake in hindsight about cutting that one scene that turned out to be a SequelHook.

** A great example is the VERY FIRST ''EU/Legends'' fiction, the novel ''Literature/SplinterInTheMindsEye'', which was published between ''Film/ANewHope'' and ''Film/TheEmpireStrikesBack''. It was intended as a possible TV Movie canon sequel by Lucas in the event that ''Film/ANewHope'' didn't pan out. Among other things; Luke and Leia are implied to have a budding romantic/sexual relationship.

Compare SeriesContinuityError, where two or more installments of the same branch of a franchise unintentionally contradict each other. See also EarlyInstallmentWeirdness and ContinuitySnarl. Often results in CharacterizationMarchesOn when a character from the original work ends up behaving differently in the followup than they are depicted in the spinoffs. Not to be confused with SchrodingersCanon, where there's still a chance that the spin-off in question might be considered canon. The {{Fanon}} counterpart to this trope is OutdatedByCanon. contrast with OvertookTheManga for when an adaptation moves past the original source and has to come up with as solution.

Compare SeriesContinuityError, where two or more installments of the same branch of a franchise unintentionally contradict each other. See also EarlyInstallmentWeirdness and ContinuitySnarl. Often results in CharacterizationMarchesOn when a character from the original work ends up behaving differently in the followup than they are depicted in the spinoffs. Not to be confused with SchrodingersCanon, where there's still a chance that the spin-off in question might be considered canon. The {{Fanon}} counterpart to this trope is OutdatedByCanon.

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* Any portrayal of the Space Jockeys (now known as Engineers) in the ''Franchise/{{Alien}}'', ''Franchise/{{Predator}}'', or ''Franchise/AlienVsPredator'' expanded universe prior to the release of Film/{{Prometheus}} is guaranteed to fall under this trope.

* Any portrayal of the Space Jockeys (now known as Engineers) in the ''Franchise/{{Alien}}'', ''Franchise/{{Predator}}'', or ''Franchise/AliensVsPredator'' expanded universe prior to the release of Film/{{Prometheus}} is guaranteed to fall under this trope.

* ''[[VideoGame/WarInTheNorth The Lord of the Rings: War in the North]]'', which is primarily based on [[Film/TheLordOfTheRings the film continuity]], tries to incorporate an abundance of content from the novel as well. When Peter Jackson's [[Film/TheHobbit film adaptations]] of ''Literature/TheHobbit'' hit theaters just a couple years later, a certain novel-accurate reference to the War of the Dwarves and Orcs [[spoiler: (specifically, Azog being killed by Dain Ironfoot during that war)]] became ''very'' contradictory to how it happened in the film continuity.