I think Jere Burns would make an excellent Jack Napier. Hit the jump to see how he could look a little more... colorful.

Now, obviously he wouldn't actually BE the Joker in this series... if anything, he'd be a failing comedian or something, someone in the background at the beginning. Maybe as the series progressed we'd see the germ of his eventual character of the Joker take root; maybe have him as a patsy for the mob, or perhaps have him as a sociopathic serial killer. The guy can do menacing like no one's business. Any thoughts?