This is all going to come down to how much each Pac 12 school gets from their new contract, and how much every school other than Udub and Oregon are going to throw into the pot to keep those to schools happy.
No way, do I see some of these schools locking themselves into a long-term deal with the conference, I would bet that Oregon, Washington, Utah and maybe Stanford are playing the waiting game, with the B10, and watching what the ACC is going to do over the next 10 years.
As others have said, the Arizona schools are the key, they have to realize that they are not going to end up in the B10 nor SEC, and if the conference wants them to take less money to appease Washington and Oregon, I could see them looking to jump and the dam breaking here.