When looking at who the Big XII could add, I would look first to eliminate those who are unlikely (at best) to be considered. I would drop any G5 school from Texas, since there are already four in the conference, any school with an athletic budget smaller than $40 million and any school with an enrollment south of 10,000. That would eliminate SMU, Houston, Tulane, Colorado State, New Mexico State, East Carolina, Fresno State and Wyoming.
IMO, that leaves the following schools under consideration:
UConn
Cincinnati
New Mexico
UCF
USF
Boise State
San Diego State
Memphis
and believe it or not, UNLV
If you eliminate San Diego State, UConn, Boise and UNLV for distance or academic reasons, you are left with only Cincinnati, New Mexico., Memphis and the two Florida schools. I think they would only take one Florida school, so USF drops out. So there you have it, the Big XII gets an early open of its TV contract, adds Cincinnati, Memphis, New Mexico and UCF and becomes the Big 14. Easy.
Until Texas become independent.