I think the Nolanverse should be allowed to stand as its own distinct work. Nolan had his own specific story he wanted to tell, he told it from start to finish, and the one attempt by other people to do more stories in that universe -- the Gotham Knight
anime -- was imperfectly reconcilable with the films (e.g. a cop character who was pro-Batman in the anime was anti-Batman in TDK). So maybe it's best to let it remain a completed, self-contained work and move on to create the next screen interpretation of Batman.
Although if they announced an Anne Hathaway Catwoman movie, I'd gladly make an exception for that.