Thar's a shakeup! The way things are looking, here's what I think.
SEC: I think Bama, Auburn, and UGA can all play their way in. Bama and Georgia is obvious, but Auburn would have wins over Bama and two wins over Georgia, and I think they are in if they win out. The interesting thing is if Auburn does beat Bama, Bama would be the most likely non-conference winner to get in.
ACC: Clemson and Miami can win their way in. No one else worth mentioning. If Miami loses in the championship game, could they still sneak in?
B12: Oklahoma can win their way in. TCU and Okie State can still win the conference, though not sure where that would leave them
B1G: Wisconsin can win their way in. Everyone else on shaky ground.
Pac12: Washington, Wazzu, and USC still in the mix, though they seem somewhat forgotten.
Notre Dame is probably out absent some crazy stuff, and Central Florida is still undefeated but not loved by the committee. (Though honestly, they might have an argument)
So, there is any easy path, where the playoff is the SEC winner, the ACC winner, Oklahoma, and Wisconsin. But nothing about this season says easy.