Not surprisingly, Batman fans are now debating who should play the Joker. Among the names being tossed around: Sean Penn, Crispin Glover, Lachy Hulme, and Paul Bettany. None, I feel, are quite right. The role requires a younger actor who is scary, funny, unpredictable, able to effortlessly suggest insanity, violent, charismatic, and weird. I've thought about this all day, and at the moment, there's really only one guy I can see in the part: Benicio Del Toro.