That move would put the SEC at 16 with Texas and Oklahoma
That means the Big Ten needs two, and then the ACC/B12/P12 have some shuffling depending upon who.
Initial thought:
Big Ten adds Kansas and Virginia
ACC adds Notre Dame, West Virginia, and one more. (That'd be the hope for ISU to still land P4)
Pac 12 adds four Big 12 schools (Tech, Bay, OSU, KSU probably -- maybe ISU over BU but probably not)
But I don't think the Pac 12 is going to allow that to happen without at least a pitch to Tex/Okla because they'd rather have Texas, Tech, Okla, OSU than the four I mentioned above.
The Big 12 will likely make a counter to Tex/Okla to raid at least the Arizona schools, Colorado and Utah, and maybe more from the P12. A P12/B12 lovechild could develop out of that too.