If they do go with Riddler, I'd like to see him played by the guy who played the Goblin in Spiderman. Can't remember his name all of a sudden. Depp would be great, but he is overdone IMO. Pair Riddler with Mad Hatter and have 2 'insane' villains messing with Batmans mind. A movie based off of the psychological implications this causes Bruce would be amazing.