In the earlier post about the Burke and Hare film shoot, I mentioned a source’s experience with Christopher Nolan on the Batman films and Inception.
I forgot to mention that he also said sets were either being constructed, or will soon be constructed, for the third Batman, with the possibility of shooting toward the end of the year. He also said that they were coming under budget at the end of The Dark Knight, so they built a whole extra set (possible usage in the third film).
I spoke with my source to clarify this info. See this post for more.