I think the consensus is that if this goes another step, it will be FSU & Clemson to the Big 12, NC State and Virginia Tech to the SEC and Virginia and North Carolina to the Big Ten.
The question, then, is who does the Big 12 take with its last four spots? Miami will assuredly be one. Pitt, Louisville, Syracuse, Georgia Tech and Notre Dame will be the others to choose from. Notre Dame is the obvious one if they elect to finally join a conference in full.
The other issue I see is what on earth does the Pac-12 do? Because they're landlocked and because they elected not to take Oklahoma and Oklahoma State last fall (huge mistake IMHO), they will have to take schools like Hawai'i, New Mexico and UNLV if they wish to expand, unless they go wayyyyyyyyyy East and take Duke, Wake, etc. The other possibility is BYU, but the longstanding assumption has been they are vehemently opposed to BYU for reasons that are apparent given the school's mission (no pun intended). That said, BYU is the only obvious choice if the Pac-12 is to go beyond 12 teams.