Obviously, I don't think Denard Robinson has a future at QB in the NFL.
That said, his athleticism is 1st round caliber, and at the very least I could see him being an intriguing kick return prospect. With just a little more bulk he could be an electric RB, and if he can learn to play WR, he could be a Percy Harvin type threat after the catch, and I think John Schneider would like that very much.
Here is a highlight video of him from 2009-2011. If he's around late in the draft, there is a chance he could be on Seattle's radar. PC/JS have not shied from projects late in the draft.