I think the better question is do we really want the first time Superman and Batman appear on screen to NOT be Clark and Bruce? I'll have trouble accepting him even as Batman honestly if it's JLG. Firstly he's not Bruce and looks 19. Sure the suit will beef him up ala Keaton but he's still just a poor substitute for the real thing. It seems a poor attempt to make the Nolan saga part of something more than it was designed to be.