Actually I'd agree with Nat, heh hence why my game, Eden City is actually a fairly low powered game. ^^ But I think this game relates well to Justice League, you have a few (Green Arrow, Batman) that really rely on skills for their hero stuff, but others like Wonder Woman, and Superman rely on their strength. And if you notice, usually the super strong ones have a sort of naivity to them while the weaker ones have a super strong mind.
So basically I think that maybe the hero's and sidekicks shouldn't be judged by how physically powerful they are (Batman and Superman are equals) but by how the character is built. If that makes sense.