I would imagine Alabama will be preseason #1 again going into next season. They lose a lot, but so do most of the other top programs that could challenge them. They also have a lot more waiting for their turn to play than do the other programs.
Outside the SEC, I see Clemson, Ohio State, and traditionally overrated Notre Dame being less than Alabama next year.
Inside the SEC, only Georgia seems like a potential threat unless Texas A&M has some strong QB and OL folks waiting their turn in line.
Oklahoma might surprise.
Best chance is for Bama to lose a SEC game or two. Otherwise, I see them right back competing for the NC again next year.