Could be, but I don't think so. He's had a taste and shown that he can turn around a team and succeed in the league. He's got a great gig that happens to be his alma mater as well. I think he ends his career in Ann Arbor
A taste is cool, but a Super Bowl ring is cooler. He's shown he's capable of winning one, so after a few college national titles, I think he very seriously considers another run in the NFL.
I first read that as Saban being manhunted for the Colts Job and got my hopes up, though I don't see him leaving Bama until he retires.