QuackVader
Hey author, what about the concept of the Bleed From DC? Its basically the Quantum Realm in a multiversal scale, you should be able to use it like the people from DC use it, every universe with a multiverse in it should have a Bleed, even if its not a DC universe, read up the wiki about The Bleed, sounds like the perfect thing for you to draw power from on your fanfic, even if its Marvel and not DC, please look it up.
who could create a crossover story, of "attack of the titans" with "marvel" where the protagonist has the power of ymir from the founding titan (with the generic powers that I don't know what they are) and when he eats a mutant he gets his powers and can use in his human form as in his titan form. Sadly I don't know how to create stories, that's why I write this in case someone is inspired to create it. Autor maybe you could write it (all this was translated with google) thanks for your attention.