Outside of [i]maybe[/i] the Joker I don't think villains should need to be rubber-stamped. Even if Supes were alive, I think Lex is enough of a character in and of his own that the application should stand on its own merits. If there's anything wildly, wildly wrong, sure something should be said, but I think it's important to always err on the side of having more active players than pacifying the ones we already have.