Yes, once the GOR's expire (or are close to expiring)...I see the SEC and B1G (not ACC) picking apart schools from the Big 12 and ACC.
The Big 12 is clearly divided on realignment. Some of the lesser schools like Baylor, Kansas State possibly Oklahoma State are clearly at least open to the idea of expansion. The problem is the powers in the conference, namely Texas, are not so keen on expansion. The only way they'd want to add teams is if it significantly added revenue to the league...and schools like Cincinnati, Memphis and other AAC schools do nothing to contribute to that.
Texas and Oklahoma know that when the Big 12 falls apart, they will have their choice of conference. The PAC 12, SEC and B1G will all try to scoop them up. They have no worries about the future. There is no incentive for those powers to expand when they know that they'll never be in any real danger.
Think about a scenario like the Big East where first Miami(FL), Virginia Tech and Boston College were picked apart. The Big East backfilled with UC, UofL and USF and remained at 8 football members. Many were begging for expansion in adding schools like Memphis and ECU but the leadership in the Big East had no interest. Now you see that basically everyone in the Big East found a home in another P5 league and only UC, UConn and USF were left out to dry. The Big 12 will experience something similar, first Nebraska, Texas A&M and Colorado are picked off, then they refuse to expand beyond the minimum and eventually a few of the bottom schools will be left out when Texas, Oklahoma and Kansas find homes in other P4 conferences...