I believe him when he says that the Big 10 is looking at 3 scenarios:
1- stay at 11 teams (life's pretty good as it is)
2- add 1 team that's revenue positive and gives the championship game revenue (Notre Dame preferred)
3- add 5 teams to go to 16 and create a super conference (the scenario that makes the dominos fall)
Consider, if they did that, then the Big 16 would probably go after big media markets and snag Notre Dame for national and then 4 from the group of Rutgers, Boston College, Pittsburgh, Syracuse, Connecticut, Missouri and Nebraska.
SEC would respond by adding 4... Clemson, Florida State, Texas and Texas A&M. They might also look to the southwest and consider Oklahoma and Oklahoma State instead of Florida State and Clemson. An SEC West of Ole Miss, Mississippi State, LSU, Arkansas, UT, TAMU, OU & OSU would definitely work and balance an SEC East of Florida, Georgia, Alabama, Auburn, Tennessee, Kentucky, Vanderbilt and South Carolina. (Although they'd trade Vandy for FSU in a heartbeat despite the Nashville market.)
ACC would be down to 9-10 teams, Big East down to 4-6, they merge to get to at least 12 and maybe find a path to 16. The 7 non-football programs in the Big East (8, but lost Notre Dame), would probably raid the A-10 for basketball to get up to a 16-team basketball conference. The new ACC probably pulls Temple for full membership and access to the Philadelphia market. I'm not sure who else they'd target. I could see them taking a long look at UMass if they're going to FBS for football (and the Big 10/16 took Boston College away).
Big 12 is cooked with the loss of between 2 and 4 of its top programs and is done as a conference. The Pac 10 goes to 16 by picking of CU, KU and UofU... plus 3 more that could come from NU and MU if they didn't get the Big 16 invite, OU if they didn't get the SEC invite, or could include a program or two from the state of Texas (TCU, TTU, Baylor or Houston). KSU, ISU and OSU wouldn't have much chance because of small media markets and/or being light on academics, but Oklahoma politics could possibly be forced as a tag-along with OU.
We could realistically end up with 4 superconferences that had 16 teams apiece.