Texas/A&M
Texas/OU
Texas/Arkansas
Restoring the old SWC rivalries is what I see the most of.
Notre Dame isn't going to join a conference unless they are forced to. They are the only college football program with a truly national fan base. They can negotiate their own tv deal. No other program can do that.
Clemson is going to be stuck in the ACC for a while, that makes me happy. Miami will stay as well as FSU. The ACC screwed up royally when it expanded and grabbed Syracuse, BC and Pitt. Those three programs were already weak and in a region with very little fan interest in college football.