It's the early 2020's and schools are announcing two years prior to the end of their GOR that they are leaving.

Oklahoma and Oklahoma State announce together they are leaving for the SEC.

The B12 starts looking at TV evacuations and realignment.

Kansas decides to go to the B1G.

West Virginia lands in the ACC.

Texas decides its best to stay at a six member conference. Kansas State and Iowa State don't add a whole lot to the pot. They get replaced with BYU and local tag along Boise State. TV says in order to maximize payouts, this small conference needs to schedule big games and names to make up for lack of inventory.

Texas maintains Oklahoma rivalry and adds Arkansas to a ten year contract. A&M agrees to some years as a trial run.

So the Big 12 dies.
Oklahoma and Oklahoma State to the SEC
Kansas to the Big Ten (with Connecticut)
West Virginia to the ACC (with Cincinnati)
Kansas State and Iowa State to American Conference

Southwest Conference 2.0 is born
Texas, Texas Tech, Baylor, TCU, BYU, Boise State