with 24 to 40 teams split into 4 or 5 divisions. This means that instead of expansion i believe it will be a consolidation of power with around half of the p5 teams getting axed. That means both BYU and Utah are not likely to be part of it.
So maybe we could see a conference or division formed of the best of rest. I really don't see expansion happening at all, it is more likely that the top dogs are interested in further distancing from the rest of the pack.