Nobody really knows anything here, but one thing that should be obvious is with the PAC blowing up Zona, ASU, and Utah really don't have any more leverage than UConn does. The Big 12 isn't going to take any or all of them because three teams "banded together" according to some tweet, or the Arizona board of regents says so. Where the hell else is Zona going to go if the Big 12 doesn't meet their demands of taking ASU and Utah? In order to have any leverage they needed to leave before Wash and Oregon...they didn't.
No...the Big 12 will now pick the team(s) it wants from a collection of equally desperate Zona, UConn, ASU, and Utah. I don't see how they leave the one available eastern team on the table in this scenario, but I'm biased. My guess would be:
Big 12 takes Zona, UConn, and ASU. A version of the PAC limps along with Stanford, Cal, WSU, OSU, Utah, and 3-5 teams from the MWC (this actually wouldn't be a horrible conference...but not P5/4/3/whatever).