Reed and Williams are the only ones above him in class I believe, so I would say he has a good chance of starting, given the good words about him before the injury.
I could see him adding weight and playing LB.... Kid is a football player. But I know nothing. Jerome Baker weighs 225 starts for OSU. JoJo weighs 205 and could add 15 pounds by next fall.....
Yes, Domann will be a starter next season. He was actually 100% by mid November, but there was no reason to pull off the redshirt for this steaming pile of crap season.
I expect Doman and a JUCO safety to start next season. Aaron Williams will be more of a full time nickel.
He was on track to be #2 at safety before the injury IIRC. I've been a big fan of his, not sure what it is, I just like the way he carries himself and his reputation as a very savvy player.