I've read that Ray Liotta was Tim Burton's first choice for the Joker back int eh 1989 film, but he opted to do Goodfellas instead. Perhaps Liotta could be a good choice for the Joker... He wouldn't be fisically menacing, he would be more of a twisted, sick, demented version of the Joker, like Jack Nocholson's mixed with Joe Pesci's characters from Goodefellas and Casino...