UNC would not get in ahead of Tennessee, the OSU/Michigan loser, or a one-loss PAC championship game winner. They'd need to Tennessee to lose in the next 3 weeks, the OSU/Michigan loser to have lost in the next 2 weeks, and the top PAC teams to all have 2 losses. I don't think Clemson, if they recover to win the ACC, beats out Tennessee or a one-loss PAC champion.
So many are picking Texas to win this weekend, that if TCU pulls the "upset" I can see them being placed at #3 next week ahead of Michigan.