Speaking only of the B1G and the SEC, I don't think you will ever see an undefeated champion again. UGA has the most talent this year and we play away at the nos. 5, 6 and 7 teams by many pre-season polls - @Bama, @Texas, @Ole Miss. The AU, UF, and UTjr. Throw in Clemson and an improved Georgia Tech. @Ky, MSU. No way we go undefeated.
These two conferences are just too loaded to think a team can run through them without a loss.
Even for the other P conferences, if they get through their easier conference, they will have to play at least 2 games against the SEC and B1G's best.