I think it does seem to come down to Coker and Morris, but if the way the coaches are handling it is any indication, it seems like a case of 1A and 1B. At least in theory, I'm guessing they'll have two guys they want to get a lot of reps (if not Wisconsin then Middle Tennessee) and by the Ole Miss or Georgia game I suppose things will be more set in stone.
I honestly don't see much of an advantage to Morris being the starter over Coker, long term at least. Just because Cornwell didn't live up to unrealistic expectations that existed for a month or two or what ever, doesn't mean he can't develop into what some hope he can. Likewise, just because Barnett can't start as a true freshman doesn't mean someone with his talent can't start as a redshirt freshman. So, we'll see who ends up being the guy this year but I honestly hope that when it's all said and done Barnett gets a legitimate shot next year at starting, either way.