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Crossover Alternate Universe

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Some crossovers start a storyline in one piece of media and finish it in another. Others bring existing characters to the same place. A crossover alternate universe is where a universe is created solely for the purpose of a bringing together characters for whom the above two options aren't available.

This usually happens for one of the following three reasons:

1. A fake crossover is needed. The writers can't simply transport all the characters to an existing universe due to plot necessities or copyright reasons.


2. The original work is not ongoing. It would be impossible to have the characters pop up in existing stories. This is common in Fairy Tale Free For Alls and other works involving public domain characters.

3. The writers need to give the characters backstories different from what they are in their original stories.

Usually (but not always), the universe isn't used again after the crossover finishes. Subtrope of Alternate Universe.



    open/close all folders 

    Anime and Manga 

    Comic Books 
  • This technique is used whenever a crossover happens between Marvel Comics and DC Comics. Most notable is the Amalgam Universe.
    • Speaking of Marvel and DC, at first every comic book was its own story with its own universe, each being an anthology series. Neither company had originally planned to create a Shared Universe. Then the stories started colliding, creating superhero teams such as the Justice League and the Avengers.
    • In the commentary for the collectors' edition of JLA/Avengers, which doesn't use this trope, the universe where all the non-dimension-hopping-involving crossovers was set was called "Earth-$".
  • Kill Shakespeare takes place in a universe in which the characters' experiences differ from all of their backstories in the original works.

    Films — Animation 
  • Played with in Spider-Man: Into the Spider-Verse. The universe is separate from any existing continuity (it was created for the movie) and doesn't initially appear to be a crossover, but that changes about 40 minutes into the film when the other Spider-Men are brought in from other universes.

    Films — Live Action 

    Live-Action TV 

    Video Games 


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