Although the entire cast probably won’t be announced until just before or at E3 2012, you can check out the latest screens for PlayStation All-Stars Battle Royale . 
 
Sony is keeping a firm-grasp on all the details for the game, which for Sony around E3 time is pretty impressive. The game debuted a few weeks ago with a short teaser trailer and promises of more announcements at E3 2012 this year.
 
So you have about 3 weeks until all the information is released. Until then, as promised, you can check out the new screens that were released today. You get to know at least a few of the characters if anything.