I haven't heard anything, but wouldn't it be sweet if he came back. And icing on the cake would be if D. Allen decided to stay too, which I highly doubt and can't really blame the guy. His stock is sky high right now.
Who knows, he could always roll the dice, but he will most likely stay. He would be a late round pick at best b/c there are too many questions about his durability. He would help himself tremendously by staying another year, and that's the likely scenario.
He needs to come back. Just look at his production when healthy; if he can prove to scouts that he can handle 15-20 touches a game and stay healthy, he has the potential to be a shoo in for the second round next year. Plus it would give us another recruiting/redshirt cycle to build depth at RB...