Heath Ledger was, of course, obliged to make his Joker look more street-loony and smeared-up than Jack Nicholson‘s green-haired goblin, and make him stagger and prance and lunge around in an even more wackazoid fashion. Ledger has definitely created a Joker that owes nothing to either Nicholson or Cesar Romero. This is certainly indicated by a new high-deffy Dark Knight trailer. It’s almost stunning to realize that Nicholson’s Joker made his big-screen debut 18 and 1/2 years ago.