I can see it, I think he would be a pretty good choice one the one hand, but alot of people I think are still pulling for him to play captain america in that movie sometime down the road, I think he would make a convincing joker though, the problem I think would be, a couple people might think he would over shadow the charcter, similar to what nicholson did in batman 89, I mean nicholson played an awesome joker, but people saw him first as nicholson then as joker, and if they were to cast brad pitt, I would see the same thing happening again, I would rather they go with an actor who is not as well known, someone like crispin glover, or adrian brody if he put on some muscle, I think brody could do it because I saw him play a killer in a movie where he buried this girl alive, but I can't remember the name of it, my only gripe with brody is he looks like bale would break him in two, so if he put on some muscle I would agree with him.