I think these schools get left out:
TCU
Baylor
Iowa State
KState
Oklahoma State
WVU
Kansas goes to B10(for Nebraska) and then they also add 1 ACC team, Texas takes TT and goes wherever they want(ACC is my bet), OU to SEC(probably with VTech to get to 16).
That puts B10 at 16, ACC at 16, SEC at 16 and PAC at 12. 60 teams in.
Big XII still exists after that, and now they need teams. Should BYU join the leftovers?