NBC did the exact same thing last season just before Ed's season wrapped up, so it apparently means nothing. That's not to say it'll be back next year, but just that the wording of the promos is meaningless.
I love Ed, but if it does go away, at least my wife and I will be closer to our goal of exorcising NBC from our home! Supersize that, Zucker. (Man, I never realized how close to perfect his last name is.)