Super heros are kind of dumb in my opinion. They don't connect with the real world in any meaningful way because of their ridiculous powers.
Now, the ones that are interesting aren't "super" at all. Batman for instance is very interesting. Iron Man as well. We're talking about flawed human beings, running around in suits, doing incredible things. That's where you find the interesting stories.
I have not heard about this game at all, so I can't tell my favorite hero on that game. But the way you all are discussing about this game I would like to play this game, if I can get it in an android.