The possibility of Christopher Nolan returning for Batman 3 was in question this week when a report revealed that Nolan would need much convincing to come back.
IGN spoke with Batman Begins and The Dark Knight writer David Goyer, who gave a brief and positive disclosure that Nolan would return to the Batman franchise.
Well, I believe he said if we can find the story that he's happy with, that he would return. And unfortunately, respecting Chris... You know, talk to him after he finishes Inception, which he's shooting right now. That just started shooting.
What Goyer means by "unfortunately, respecting Chris..." is anyone's guess. It's best to concentrate on the "he would return" part.