Since they plan to do a Justice League movie (Avengers type all-star movie) I believe that they probably find the current version of Batman as too dark. So they are most likely going to reinvent him in the Justice League and start a new franchise with that version of Batman instead of the Dark Knight version. They are also planning a Flash, Wonder Woman and another Superman movie as well.
As for TDKR, I can't wait to see it. My son and I are huge Batman fans and will be at the theater for the very first showing.