At this point, I get the feeling the PAC will get a satisfactory deal and hold together. My prediction is that The new deal will be a 6 or 7 year agreement that includes them adding SDSU for the SoCal foot print and SMU for the Texas connection. The dollar value will be in the ballpark of the Big 12's deal, but the new teams will take a reduced cut for 2-3 years, meaning that the existing 10 schools will receive larger payouts then the Big 12 schools.
This sets up the B1G, B12, and PAC media contracts all expiring in 2030/31, while the SEC expires in 2034 and the ACC in 2036. I expect we are going to get about 5 years of quiet on realignment within the former P5, before things heat up again in 2028/29. This would also mean that the ACC is closer to the end of their GOR, so schools like FSU, Clemson, and Miami may be more willing to leave and deal with the legal/financial ramifications of that separation.