The future of Adrian Peterson is not as a running back. Not for the Seattle Seahawks, at least. Rashaad Penny has that job now, as does Chris Carson if his neck injury will allow.
But as a coach?
Not only is it possible, but the first conversation has already happened, per Pete Carroll.
... Carroll added: "There are a lot of things that he can do in the world, he doesn’t have to be a ball coach, but he certainly would have a chance to be a great one.