by Johnny Q
I've never understood the issue with having supervillains or another hero's gear/powers in your deck.With the supervillains, your hero has foiled that villain's evil plot in your city. However, they are still at large in the world causing problems for the other heroes.
With other hero's powers. Well, that is one of your friends helping you out (they are all in the League after all). Or it is some comic where purple kryptonite gives batman temporary powers. That kind of craziness happens alot in comics.
Sure it is all a bit abstract, but its a freaking card game people!