It appears that OU has reached its breaking point over XII expansion and football playoffs with U Texas. Even the rumor that the XII would consider adding U Houston, which does nothing marketwise for the XII, make it clear that Texas and Texas politicians control the XII. If the XII is locked out fo the football playoff again this season, the XII will collapse. One big question to be resolved is to what degree the 6 states schools are tied to each (Oklahoma & OK State, Kansas & K State, U Texas & Texas Tech) other because I don't see the B1G nor the SEC doubling down on Kansas and Oklahoma. Only the PAC has the room and interest to take on all 6 programs.
In my imagination, the B1g gets Kansas (15) and Oklahoma (16) immediately on board. That lures Missouri (17) in also. Texas quickly realizes that it is about to become a conference of one and decides that the total value offered by the B1G outweighs any special deals that the ACC and PAC may offer and joins (18). UConn (19) is added to fill in the east and no one complains with OU and Texas now in the fold. A conference spanning from the northeast megalopolis (Boston, NYC, Philly, DC) to Texas is enough for ND to give-up independence and joins as #20. The B1G for football divides into 4 pods, with the East pod consisting of 1) UConn, 2) Rutgers, 3) Maryland, 4) Penn St, 5) ND. The other pods are - North (Ohio St, Michigan, Michigan St, Indiana, Purdue), West (Illinois, Northwestern, Wisconsin, Minnesota, Iowa), and South (Missouri, Nebraska, Kansas, Oklahoma, Texas).
The ACC replaces ND with Cincinnati and then gets to 16 by adding a combination arrangement with Navy (football only plus maybe Lax) and Georgetown (all sports except football). The SEC replaces Missouri with West Virginia (sort of helps with DC, Midwest & profile is similar) and add OK St (#15) and Baylor or TCU (#16) as the Texas market is large enough to support 2 schools and neither would threaten A&M like Texas would. The PAC adds Kansas St (#13), Texas Tech (#14), Colorado St (#15), and BYU (#16) and then down the road adds 4 more to get to 20 (SD St, UNLV, Boise St, and Houston).