History AbortedArc / MarvelCinematicUniverse

* The Phase 5 films and series were initially to set up the fifth ''Avengers'' film, which was to be titled ''The Kang Dynasty''. However, in December 2023, Creator/JonathanMajors, who played Kang and his variants, was fired from the role after being found guilty of assault and harassment. The fifth ''Avengers'' film has since been retitled ''Avengers 5'', and it is unknown how or if the Kang storylines will be resolved.

* ''Film/BlackPantherWakandaForever'' has Everett Ross on the run from the CIA after he's caught illegally helping the Wakandans. Come Series/SecretInvasion, he's working with Nick Fury, a member of the American government, as well as other CIA agents, without explanation.

* The Phase 5 films and series were initially to set up the fifth ''Avengers'' film, which was to be titled ''The Kang Dynasty''. However, in December 2023, Jonathan Majors, who played Kang and his variants, was fired from the role after being found guilty of assault and harassment. The fifth ''Avengers'' film has since been retitled ''Avengers 5'', and it is unknown how or if the Kang storylines will be resolved.

* The New Avengers at the end of ''Film/AvengersAgeOfUltron'' were hyped up as a replacement roster because of Tony retiring, Hulk going missing and Thor leaving to look for the Infinity Stones. They proceeded to do one onscreen mission in ''Civil War''[[note:during which War Machine and Vision, two of the new members, are completly absent]] which lead to the eponymous conflict and then quietly disappeared until ''Film/AvengersInfinityWar'' 3 years later, [[spoiler:in which the DownerEnding has most of them being snapped away and leading to [[PuttingTheBandBackTogether the original Avengers coming back together]] for ''Film/AvengersEndgame'']].

* The New Avengers at the end of ''Film/AvengersAgeOfUltron'' were hyped up as a replacement roster because of Tony retiring, Hulk going missing and Thor leaving to look for the Infinity Stones. They proceeded to do one onscreen mission in ''Civil War'' which lead to the eponymous conflict and then quietly disappeared until ''Film/AvengersInfinityWar'' 3 years later, [[spoiler:in which the DownerEnding has most of them being snapped away and leading to [[PuttingTheBandBackTogether the original Avengers coming back together]] for ''Film/AvengersEndgame'']].

* At the close of ''Film/AvengersEndgame'', Thor, seeking a fresh start, leaves Earth behind and joins up with the Guardians of the Galaxy. This status quo is quickly abandoned in ''Film/ThorLoveAndThunder'', which sees Thor part ways with the Guardians ([[TheFriendNobodylikes who have already grown tired of him]]) and return to Earth within the first act.

** The Maximoff twins have a major subplot involving them seeking revenge on Tony Stark for killing their parents. There's no real resolution to this, as they only side with the Avengers because they realize Ultron is an even greater evil, not out of any real epiphany about Tony not being such a bad guy.

** Both in-universe and a meta example, despite it being a trademark of his backstory and one of the reasons the army is in the supersoldier business, Steve doesn't actually fight any Nazis, just in films and comic books. Justified since by the time he gets sent overseas and begins to take part in the war, Schmidt and HYDRA are much larger threats. Although his Smithsonian exhibit in ''The Winter Soldier'' shows that the Howling Commandos did offscreen missions against non-HYDRA soldiers.

* ''Film/Dr.Strange'' ends with Karl Mordo being disillusioned with the Ancient One and leaving on a mission to purge the world of magic users; heavily implying that this was going to the main conflict for the sequel. However, outside of a brief mention, there is no appearance of the original Mordo at all in ''Film/MultiverseofMadness'' and instead we encounter a variant of him from another universe. There is also no mention of his on-going mission to rid the world of magic users and an art concept book implies that he was possibly killed by the Scarlet Witch.

** This movie's [[StillbornFranchise poor box-office returns]] created a big one involving [[MadScientist Dr. Samuel Sterns]] and his StartOfDarkness. Though the studio was able to continue Bruce Banner's character arc with his appearance in ''Film/{{The Avengers|2012}}'', the lack of direct sequels to ''The Incredible Hulk'' meant that we never got to see the fallout from [[spoiler:Sterns using Banner's gamma-irradiated blood to turn himself into the Leader]]. This plot thread was [[AllThereInTheManual eventually continued]] in the ''[[ComicBook/TheAvengersPreludeFurysBigWeek Fury's Big Week]]'' comic that was released as a prequel to ''The Avengers''. In it, [[spoiler:Sterns uses his new abilities to attack Black Widow, only to end up knocked out and taken into custody by ComicBook/{{SHIELD}}.]] Additionally, Samuel Sterns is set to return in ''Captain America: New World Order'' with Creator/TimBlakeNelson reprising the role.

** TheStinger ending of the show has Wanda using the Darkhold when she hears her children crying out for help. ''Film/DoctorStrangeAndTheMultiverseOfMadness'' ignores this and instead has Wanda trying to gain the power to travel to another universe where her kids are alive, well, and not in any kind of distress that would lead to them calling her for help.

* ''Series/WandaVision'': : An in-universe example. Much of the conflict in the early episodes is derived from Wanda and Vision having to hide their superpowers from the residents of Westview. However, as the series goes on, both characters use their powers in full view of these people, [[WeirdnessCensor who don't seem to have any reaction.]] This is showing that the ShowWithinAShow is "losing the plot" while the reality of the situation becomes harder and harder to ignore.

** Hydra agent Mitchell Carson got Pym particles in ''Film/AntMan1''. If he ever used them, it has never been addressed.

AbortedArc in this series.

** Thor's vision of Asgard was supposed to setup ''Film/ThorRagnarok''. Depictions of the Asgardians descending into decadence, demonic musicians, and Heimdall being blinded were all meant to foreshadow the events of the upcoming film. Once Creator/TaikaWaititi was brought onboard as the film's director, ''Ragnarok'' underwent a complete ToneShift and much of the imagery seen in Thor's vision went unused.

** HYDRA agent Mitchell Carson got Pym particles in ''Film/AntMan1''. If he ever used them, it has never been addressed.

** Shortly after Ghost reveals Hank Pym's role in her father's death, Hank defends himself by claiming that Elihas was a traitor who deserved to be fired, for reasons he doesn't elaborate on. There is no followup or clarification on this later on -- it never gets brought up again.

* The New Avengers at the end of ''Film/AvengersAgeOfUltron'' were hyped up as a replacement roster because of Tony retiring, Hulk going missing and Thor leaving to look for the Infinity Stones. They proceeded to do one onscreen mission in ''Civil War'' which lead to the eponymous conflict and then quietly disappeared until ''Film/AvengersInfinityWar'' 3 years later, which saw most of them being snapped away and leading to [[PuttingTheBandBackTogether the original Avengers coming back together]] for ''Film/AvengersEndgame''.

* The New Avengers at the end of ''Film/AvengersAgeOfUltron'' were hyped up as a replacement roster because of Tony retiring, Hulk going missing and Thor leaving to look for the Infinity Stones. They proceeded to do one onscreen mission in ''Civil War'' which lead to the eponymous conflict and then quietly disappeared until ''Film/AvengersInfinityWar'' 3 years later.

** This movie's [[StillbornFranchise poor box-office returns]] created a big one involving [[MadScientist Dr. Samuel Sterns]] and his StartOfDarkness. Though the studio was able to continue Bruce Banner's character arc with his appearance in ''Film/{{The Avengers|2012}}'', the lack of direct sequels to ''The Incredible Hulk'' meant that we never got to see the fallout from [[spoiler:Sterns using Banner's gamma-irradiated blood to turn himself into the Leader]]. This plot thread was [[AllThereInTheManual eventually continued]] in the ''[[ComicBook/TheAvengersPreludeFurysBigWeek Fury's Big Week]]'' comic that was released as a prequel to ''The Avengers''. In it, [[spoiler:Sterns uses his new abilities to attack Black Widow, only to end up knocked out and taken into custody by ComicBook/{{SHIELD}}.]] Additionally, Samuel Sterns is set to return in ''Captain America: New World Order'' with Tim Blake Nelson reprising the role.

* ''Film/SpiderManHomecoming'' ended with Adrian Toomes aka The Vulture aware that Peter Parker is Spider-Man but refusing to disclose his identity out of gratitude for Peter saving the lives of him and his daughter. In TheStinger one of Vulture's accomplices, Mac Gargan makes it clear he doesn't buy Vulture's claims of not knowing Spider-Man's identity and will pry the information out of him to get vengeance. Neither of the film's sequels features Toomes or Gargan and the end of ''Film/SpiderManNoWayHome'' has [[spoiler: all memories of Peter Parker being erased from the universe, making it impossible for the plot thread to resume]]. However, it becomes subverted when [[spoiler:he turned out to have been teleported into Film/SonysSpiderManUniverse by the same spell that erased Spider-Man's identity, as shown in ''Film/Morbius2022'', and seeks to form the ComicBook/SinisterSix with him]].

** This movie's [[StillbornFranchise poor box-office returns]] created a big one involving [[MadScientist Dr. Samuel Sterns]] and his StartOfDarkness. Though the studio was able to continue Bruce Banner's character arc with his appearance in ''Film/{{The Avengers|2012}}'', the lack of direct sequels to ''The Incredible Hulk'' meant that we never got to see the fallout from [[spoiler:Sterns using Banner's gamma-irradiated blood to turn himself into the Leader]]. This plot thread was [[AllThereInTheManual eventually continued]] in the ''[[ComicBook/TheAvengersPreludeFurysBigWeek Fury's Big Week]]'' comic that was released as a prequel to ''The Avengers''. In it, [[spoiler:Sterns uses his new abilities to attack Black Widow, only to end up knocked out and taken into custody by ComicBook/{{SHIELD}}.]]