Why not? He left LSU after winning it all, then 2 years in the NFL, now 2 yrs with Bama, with whom he's about to win it all, so he's a comin' yo!!!
Actually he coached one more year at LSU after winning the national title and then left for more money from the Dolphins. Keep dreaming though. Saban wins the title and Bama will give him an extension and raise probably making him the highest paid coach in college football.
Most likely the next Florida coach will be Bob Stoops since he's a national championship winning head coach and already coached at Florida where he won a title there with Spurrier.