Sure, but how much would fox and ESPN pay for those TV rights especially if they had their own playoffs and championship and didn't play schools outside of their league. If you could get it to 24, you'd have a viable league with TV rights worth a lot more than any school is getting now
the NFL has 32 teams. You probably could get near consensus on the top 25 or so teams, and there are probably a few others that may not be top 25 but have the bones (size, cash, alumni, geography) to be there. A league that size could put together a multi-round playoff structure to keep things lucrative.
