Once the B1G announces its deal and Notre Dame decides to stay indy, I don't think it will be too long before we know what will happen in the Big 12 and Pac-12 since they are the only dominos left this round. The ACC is locked up for the time being.
I trust Yormark to be working the phones at FOX since all reports are that FOX couldn't care less about the Pac-12. On the other hand, once Oregon, Washington etc. understand there is no B1G spot for them right now, maybe they are more inclined to get a Pac-12 deal on the books quickly.
There is a nice symmetry of there being two major FOX conferences (B1G, Big 12), two major ESPN ones (SEC, ACC) and the top independent with NBC. Meanwhile Oregon State etc. go to the Mtn West.