Bale was contracted for a third movie. So in a dream universe where Heath had lived, Nolan stepped down after TDK and the franchise continued Bond style.....? I would have done the Prey storyline with Joker as a Hannibal Lector type. In a couple of scenes where he interacts with Batman. Of course with Strange/Catwoman. Then it would be time to tackle Riddler, Penguin, and eventually get to Bane/Talia. But it would have been years from now with a different director, different set of actors, but same continuity. It sounds like a cool thought, but i thought TDKR was incredibly epic and a bold move to go for the Dark Knight Returns/Knightfall/No Man's Land angle after Heaths death.