tbh, I'm not sure this is going to be a rebuild. Someone, whether coach/gm/owner, was pushing for him to play even tho he needed to be benched. They aren't going to cut him with that contract. There's a solid chance he's playing sometime next year.
Its a different injury, but he tore his acl when he was a freshman. He recovered fairly quickly (actually played a game with it torn) and played great the next year. So he's shown in the past he can recover fairly quickly.
I wouldn't be surprised if they draft a qb tho and try to build him up for a few seasons. Then cut Deshaun when he only has a few years left.