I think ONLY if Michigan beats Ohio State would there be any possibility of a rematch of that game in the NC. I have to believe that if Arkansas wins out (TN, LSU, Florida) they would have to be at least considered in the conversation.
I was looking on the ESPN message boards last night and some guy was comparing the remaining schedules of Texas and Florida. They are basically almost exactly the same. Florida plays like #34 team, #100, and #50. Texas' is very similar to that. And then of course Florida will have the edge in schedule strength at the end of year by playing Arkansas or Auburn (Texas will play Nebraska). Even though Florida has played arguably the hardest schedule in the country this year, their remaining schedule is not that great (i think it's South Carolina, Western Carolina, and FSU + SEC champ).
Auburn is almost fucked. They will likely not even make the SEC Championship game since Arkansas beat them head to head this season. So, you could see a 1 loss Auburn not even win their own division. They would then probably be likely to play in a BCS bowl if in that position.