"I would do Batman in a second, playing anyone," the actor told Empire Magazine. "I’d play The Riddler in the next one, although it would be hard to top Heath as the villain and I’m a little hairy for tights."
Williams went on to reveal that he'd actually come close to playing a villain in both Tim Burton's Batman (1989) and Joel Schumacher's Batman Forever. (1995)
"The Batman films have screwed me twice before: years ago they offered my The Joker and then gave it to Jack Nicholson, then they offered me The Riddler and gave it to Jim Carrey. I’d be like, 'OK, is this a real offer? If it is, then the answer’s yes. Don’t pump me again mother[frick]ers!'"