Re: Elseworlds
A couple of years back my previous incarnation started a thread about how marvel comics was really several different not especially compatible universes held together with baling wire and duct tape and suggested it might be interesting to have alternate more consistent versions of the marvel universe. Among the spin-offs were:
X-Men: The primary power source is mutation, although there is also some super-advanced technology, much of it created by mutants. There are no characters with magic and no radiation accidents. Thus, Reed Richards is a scientific genius who has three mutants who he has been studying, Ben, Johnny and Susan. Iron Man's armour was created by Forge, who works for Stark Industries. And so forth.
Iron Man: The power source is technology, so the heroes and villains of this world have costumes/armour that gives them powers or are robots cyborgs and androids. Thus the X-Men are a team of runaway robots gathered together by the AI Cerebro and the Fantastic Four are obedient androids based on the Human Torch's technology, while the Avengers are mostly humans with gadgets.
Thor: Characters are either mythological beings, or have been endowed with power from mythological beings or their artifacts. Thus, Spider-Man is a black man who got his powers from Anansi and Iron Man wears a suit of armour crafted by Hephaestus.
Doctor Strange: Characters are wizards, martial artists and supernatural entities who operate in secret. Thus, Reed Richards is a dabbler in wizardry who accidentally summoned the four elements into himself and three others.
And so on. You could make some interesting variants on the default Champions universe by picking restricted origin types and then modifying the official characters to fit.