Would they have a rematch for the SEC title game if the upset did happen??
The way I can see it happening, and while this is a lot of "ifs" not of them are crazy.
Auburn beats Alabama this weekend
Michigan or Michigan State beats Ohio State this weekend or next weekend
Auburn gets beat in SEC Championship Game by South Carolina next weekend
Missouri gets beat this weekend by Texas AM
South Carolina beats Clemson this this weekend
Oklahoma beats Oklahoma State next weekend.
That'd put FSU at 13-0, Alabama at 11-1, Ohio State 12-1, Auburn 11-2, Missouri 10-2, Clemson 10-2, Oklahoma State 10-2, Stanford 2 or 4 losses, Baylor 1 or 2 losses, South Carolina 10-3.
I'd think the SEC factor would be slightly enough to boost Alabama in over Ohio State.
Either way, a lot of big games left that could swing things drastically. Heck, if Oklahoma does upset Oklahoma State and Texas can win at home Thursday vs Texas Tech, then win Dec 7 at Baylor, Texas would be B12 champs.