The next round of expansion will be the leftovers of the Big 12 adding members.
If they are forced to take Houston or Memphis or such schools, they are going to get creamed with their new contract. They are not adding markets with those schools.
Obviously, the current B12 schools don't see any value with what's out there or they would have added a few years ago. BUT, if they are forced to add, they will add complete wipeouts in terms of interest or markets. These are schools that are not worth more than $5-6m a year to the conference.