OU and Texas go to the SEC. A few ACC teams go to the B1G and dissolve. Below is a list of teams I'd propose for a football only conference to make 3 super conferences.
ND
USC
Stanford
Miami
Baylor
Boston College
North Carolina
Georgia Tech
Clemson
Oklahoma State
Oregon
Pitt
UCLA
Virginia
VA Tech
You get the point. The goal of the national conference is to hit major recruiting states across the country. I don't see much movement from the B1G or SEC unless the money is much better in a football only conference.