Lets play a "not quite there yet" game: What if?
1). The Pacific Coast League adds, fairly quickly, both Oklahomas, Texas, and Texas Tech. Now they've got their 16.
2). The SEC sees this, weighs it, and adds Missouri to pair up with Texas A&M. That's 14. Who are they now saving two spots for? Negotiations behind the scenes are hot [this is a theory] with two little ol' Florida schools in the ACC who never have really fit there. The U of Florida is becoming pressured to shut up and get out of the way. There becomes a silent commit to reach their 16. FSU and Miami don't sweat the $20 million buy-out cost, as membership in the SEC pays them $5 million more per year than in the ACC. They'll make it up quickly.
3). The famously pro-active ACC commissioner has seen the FSU/Miami situation as a mine-field all along, and his rapid pursuit of Pitt and Syracuse was meant to keep FSU/Miami in the best case scenario, but at least position the ACC favorably for other moves if they ultimately left. The Pitt/Syracuse move got him to 14, but the ultimate FSU/Miami defections will land him back at twelve. At the moment he is at 14, but he retains wiggle room by telling WVU "no".
4). Everyone is moving but the BIG. It sits there at 12, and asks itself "who, if anyone do we need"? They correctly believe that they're "in" the Dance whether they're at 12, 14, or 16. They meditate on it.
So, in the scenario, what's next?
5). It becomes obvious that FSU/Miami are moving. SEC now will be 16. The ACC countermoves to ask in Rutgers and Connecticut who desperately want to be there. They do this to shore up the entire East Coast market. They are at 14 again, and waiting.
6). In the "everybody's got 16" game, the BIG is four short, but may not really care. The ACC is two short, and has its eye on a certain midwestern university. Swarbrick still is holding out.
7). The so-called "leftovers" are coalescing around Boise. BSU reaches out to TCU, BYU, KU, KSU, ISU, Baylor, Air Force, SD State, Nevada, and maybe others to form a respectable ten+ team conference containing four currently ranked teams. They hope to impress enough to be conference #5.
8). Meanwhile, WVU, Cincinnati, USF and Louisville are in shock. WVU presses its application again to the ACC, and are told that they are being "considered". If we get a certain big fish, you might be the paired member.
9). The BIG stays scratching its head: do we need anyone except ND?
!0). and the football world waits......