Bring back the Colorado/Nebraska rivalry. But Colorado and utah actually seem pretty content in the p10. So if they stay I’d still say BYU, Nebraska, and the AZ schools would be the best case scenario and make some geographic sense.
Why would Nebraska leave? They actually probably care about being relevant again more than money. And the B10 disrespected them last year with jerky scheduling after Nebraska wanted to play football during the pandemic. And no better path to the CFP in a P5 conference than B12 without OU and UT.
Why would either AZ school leave? Maybe for similar reasons, but maybe they wouldn’t. If they wouldn’t I’d take UCF, which would open up Florida recruiting to B12. Not sure what fourth school …