I remember reading in the other threads here that Nolan has three franchises fates resting in his hands.
WB is waiting for Nolan to sign on to Batman 3. Then WB can go ahead with Green Lantern and Superman
Which makes absolutely no logical sense.
Actually it does. Batman is, at the moment, WB's cashcow franchise. The Dark Knight shattered records and came close to dethrowing Titanic at the Box Office. They want to make sure it's taken care of and if Nolan doesn't sign off they need to find someone else to take over it of his ability. If they don't get Nolan they'll probably spend a lot of time and resources looking for a suitable replacement and then - after finding one - I bet he/she'd have an increased presence from management (which otherwise would have went to Green Lantern or Superman).