
Warner Brothers' Jeff Robinov, who has pushed the DC material into a much deeper rooted and grittier way of telling stories, has said this to the Wall Street Journal:
"'Superman' didn't quite work as a film in the way that we wanted it to. It didn't position the character the way he needed to be positioned. Had 'Superman' worked in 2006, we would have had a movie for Christmas of this year or 2009. But now the plan is just to reintroduce Superman without regard to a Batman and Superman movie at all."
So it does sound like Superman will be rebooted. (Shame, because I wanted a sequel to the "Superman Returns" storyline.) On top of that, Warner Brothers plans to release more DC material in the coming years; but rather than plowing out as many superhero movies as they can, like Marvel, Warner Brothers wants to focus on fewer movies and spend time on making those epic enough for audiences. This will no doubt include a "Batman 3" and "Superman" reboot.
With that said I doubt Bryan Singer will return for Superman. I'm sure he's still attached to it in some way, but from what I can tell Warner Brothers wants to bring Superman in a new direction and that will mean bringing new blood in to the franchise. So. Who do you think it should be?