What would you do with the Joker in Nolan's films? - Ignore him completely and never mention him. - Have a passing mention. - Have him referred to a lot. - Re-cast. - Using CGI techniques, take deleted scenes and/or unused vocal recordings by Heath Ledger, and with body doubles and vocal impersonations a la' The Crow, have him in the shadows and briefly seen in the film. - Have him never seen but be a driving force of the plot. - Any other ideas you might have.