Before the first official CFP rankings are released, my guess is the final four will be
Clemson
2 teams from the SEC: Alabama, Georgia, LSU
4th slot is the B1G to lose
Undefeated B1G Champ: Minnesota, Ohio St, Penn St
1 Loss Ohio St (if loss is to Penn St)
1 Loss PAC-12 Champ: Utah or Oregon
1 Loss Oklahoma
1 Loss Penn St (if loss is to Ohio St)