Christopher Nolan was recently interviewed by Empire Magazine and said the following:
On Catwoman:
I was nervous about how she would fit into our world. But Jonah was very much convinced that there would be a great way to do it and eventually turned me around. Once I got my head around the idea of looking at that character through the prism of our films, saying, ‘Who could that person be in real-life?’ we figured it out. She’s a bit of a con-woman, something of a grifter. A hard-edged kind of criminal.
On his involvement with the upcoming Man of Steel film:
It’s Zack’s [Snyder] movie so it’d be a bit rude of me to turn up and say I’ve got a few ideas now. My big point of responsibility was helping shepard David’s script. When I’m finished with this I’ll be there for whatever Zack wants from me, but it’s very much his movie.
On the Bat:
I spent a long time trying to figure out clever names for ‘bat-something-that-would-fly’, then you go: ‘Oh, it’s a bat.’ It’s very much based on a doubt-bladed helicopter idea, once again a realistic approach to military hardware. We had Corbould and his guys build it full scale and come up with this great driving rig for it so we could photograph it in real streets, and there’s a big computer graphics component to it as well. It’s fun to take Batman to the next level in terms of his transportation and weaponry – in terms of his ability to fight people.
On addressing The Joker in The Dark Knight Rises:
We’re not addressing The Joker at all. That is something I felt very strongly about in terms of my relationship with Heath and the experience I went through with him on The Dark Knight. I didn’t want to in any way try and account for a real-life tragedy. That seemed inappropriate to me. We just have a new set of characters and a continuation of Bruce Wayne’s story. Not involving The Joker.