Re: Penn, Bettany, Hammill and Carrell top list to play The Joker in next Batman movie
I think Carell is too understated to play The Joker and Sean Penn brings too much unfunny off-screen baggage to make the role work. First off, I'd say think outside the box and give the role to someone with a different ethnicity, a gift for comedy and real physical presence, like Jackie Chan or Samuel Jackson or Chris Tucker.
Looking back in the box, Will Ferrell would be good, but he's probably too expensive. How about Vince Vaughn?