There may already be a thread like this somewhere; if so I apologize.
When I read comics, sometimes the characters have a specific voice in my head. For example:
Batman - Kevin Conroy's Batman (though I don't know what Conroy normally sounds like)
Joker - Mark Hamill's Joker
Perry White - JK Simmons
How do New 52 characters sound to you? They don't have to be actors who have played the characters. They don't have to be actors at all, though some are so great it's hard to separate. Many characters barely have any TV / Movie presence. So what's the voice acting in your head? I'm sure I'll go back and reread with your suggestions.