Hey hey, let's leave Christian Bale's acting out of this. He may be a shitty person, but a shitty actor? Not by any stretch of the imagination. American Psycho, The Machinist, The Prestige, 3:10 to Yuma, Public Enemies, etc.
and Christian Bale can't do emotion? Whatever. The Prestige and The Machinist, to name a couple, have amazing emotional scenes with him in.
As for what I'd like to see. William Fichtner as The Riddler. The perfect set-up being that when The Joker put the gas grenade in his mouth (first scene of TDK) he went mad.