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).