Captain America's shield for Goofy, Dr. Strange is magic as is Thor. What is wrong with going to a world with Superheroes that are now fighting Super villains using the Heartless or Nobodies. It makes more sense than Star Wars where Star Wars is a number of different worlds instead of one distinct one. SW would be harder to explain Wookies Ewoks Hutts and all the other main aliens under one roof.
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