History SupermanStaysOutOfGotham / MarvelCinematicUniverse

** After ''Film/CaptainAmericaTheWinterSoldier'', S.H.I.E.L.D. simply does not have the resources or access it once enjoyed to investigate all incidents. Similarly, after ''Film/CaptainAmericaCivilWar'', the Avengers are similarly crippled throughout Phase Three; and most of the films during that time that feature Avengers and their allies are either fugitives or sympathetic to those who are, limiting whom they can contact and how easily.

** The Masters of the Mystic Arts and the Eternals have been around for millennia, but didn't involve themselves in any of the major conflicts before their debut movies. Both introductions explain that the groups had their own matters to deal with and aren't supposed to get involved in fights outside their mission statements.

** [[ComicBook/TheFalcon Sam Wilson]] is set up to be the only one they could go to for help that Steve could trust. He has both proven to be a good and trustworthy person, and is not on S.H.I.E.L.D.'s radar. Even then, they didn't expect his battle assistance, just his safe haven to regroup and plan. Sam just happened to be skilled enough as The Falcon that Natasha had already heard of his work without knowing it was him.

* In ''Film/ThorRagnarok'', ComicBook/DoctorStrange makes his presence known the instant Thor brings Loki to Earth, and helps them find Odin in exchange for Loki leaving ASAP. While Thor spends most of the movie stranded on Sakaar, he happens to run into the Hulk and one of the Valkyries, and manages to recruit both of them to fight Hela.
-->'''Thor:''' I'm putting together a team, like the old days!

* In ''Film/{{Eternals}}'', the Eternals have not interfered in prior potentially world-ending events because Arishem ordered them to not interfere with human conflicts unless Deviants are involved. It's later revealed that the conflicts were necessary for Earth's population to develop to the point the Emergence could take place, so naturally, the Celestials would not want to impede any progress. In the climactic final confrontation, no Avengers show up, nor do any of the Eternals attempt to contact them for assistance, with the implication that there wasn't enough time to wait for anyone else to show up. By the end of the film, [[spoiler: Thena, Druig, and Makkari have left Earth to find other Eternals, while Sersi, Phastos, and Kingo are abducted by Arishem for studying, meaning that until they all return, there's no way for them to assist any of the remaining heroes on Earth. The only remaining Eternal on Earth, Sprite, is de-powered and unable to do anything on her own.]]

* ''Film/ThorLoveAndThunder'': Thor splits off from the Guardians of the Galaxy so they can go investigate multiple attacks of Gorr the God Butcher. Thor has also become TheFriendNobodyLikes by that point, so they're unlikely to work with him again (in fact, splitting up was ''their'' idea, as a way to be rid of him). When Thor attempts to recruit the other gods to help him defeat Gorr, they refuse out of apathy towards others and cowardly fear of actually dying to Gorr, which leaves him to take on the God Butcher with only Jane, Valkyrie, and Korg. Zeus also mentions that the different pantheons have an informal agreement not to intervene with one another, explaining why they haven't gotten involved in Thor's fights and vice-versa (Thor only called on them this time since Gorr is a threat to all gods everywhere).

* ''Film/GuardiansOfTheGalaxyVol3'': At no point during the film do the titular Guardians contact anybody to help them out, despite them being in contact with the Avengers and other heroes at this point in their lives. In fairness, the only other characters who actively work in deep space are Captain Marvel, who generally doesn't like being contacted unless it's an emergency, and Thor, [[TheFriendNobodyLikes whom the Guardians likely aren't eager to work with again]]. Also in fairness, much of the film had the Guardians laboring under a ticking clock, meaning they didn't have time to wait for backup to arrive.

** At the end of the movie, [[spoiler:Kamala ends up breaking into Kate Bishop's apartment and lets her know of her idea to create a new superhero team with her.]] This ultimately doesn't go anywhere other than tease things for the future however, as the main threat of the movie has since been eliminated, meaning [[spoiler:Kate]] doesn't get to assist with things in any way.

* ''Film/GuardiansOfTheGalaxyVol3'': At no point during the film do the titular Guardians contact anybody to help them out, despite them being in contact with the Avengers and other heroes at this point in their lives. In fairness, the only other characters who actively work in deep space are Captain Marvel, who generally doesn't like being contacted unless it's an emergency, and Thor, [[TheFriendNobodyLikes whom the Guardians likely aren't eager to work with again]].

* ''[[Series/MsMarvel2022 Ms. Marvel]]'': The Department of Damage Control is currently enforcing laws regarding enhanced individuals, so it's not really something that other heroes have to deal with. When they go over the line and become a threat themselves, their conflict with Ms. Marvel is resolved overnight so none of the active heroes have time to react. The series also introduces the Red Daggers as yet another hidden society dealing with the supernatural, though they're primarily portrayed as local to Pakistan, which would explain why none of the prior heroes have ever run into them before (and probably won't in the future).

* ''Film/{{The Marvels|2023}}'' This movie actually plays with this trope a little bit.

* In ''Film/{{Eternals}}'', the Eternals have not interfered in prior potentially world-ending events because Arishem ordered them to not interfere with human conflicts unless Deviants are involved. It's later revealed that the conflicts were necessary for Earth's population to develop to the point the Emergence could take place, so naturally, the Celestials would not want to impede any progress. In the climactic final confrontation, no Avengers show up, nor do any of the Eternals attempt to contact them for assistance, with the implication that there wasn't enough time to wait for anyone else to show up. By the end of the film, [[spoiler: Thena, Druig, and Makkari have left Earth to find other Eternals, while Sersi, Phastos, and Kingo are abducted by Arishem for studying, meaning that until they all return, there's no way for them to assist any of the remaining heroes on Earth.]]

** At the end of the movie, [[spoiler:Kamala ends up breaking into [Kate Bishop's apartment and lets her know of her idea to create a new superhero team with her.]] This ultimately doesn't go anywhere other than tease things for the future however, as the main threat of the movie has since been eliminated, meaning [[spoiler:Kate]] doesn't get to assist with things in any way.