There are two locks and a maybe in the Big12 for consideration. Texas and Oklahoma are obvious. Kansas has a big time basketball program but not much on the gridiron.
It has been rumored that Texas had made it clear that if the BIG10 expands to 16 teams it wants in if the four newcomers are Texas, Oklahoma, Kansas and you Herkies are gonna love the last one - Iowa State.
Before you get all huffy about the Cyclones consider it geographically from the Longhorn and Sooner point of view, not just in football and basketball but in the other "non-revenue" sports as well. This configuration would lock up enough TV eyeballs to make it the premier league to the advertisers, while leaving the SEC, ACC and PAC12 as viable as well.
If, and it is a big if. If Notre Dame changed course and at long last accepted the inevitable and finally agreed to join the BIG10 then Texas has hinted that it would like Missouri and Arkansas to bolt and join in leaving OU, Kansas and Iowa State to find another dance partner inside a suddenly lonely conference, most likely Colorado State.
Consider this:
WEST
Texas
Oklahoma
Kansas
Nebraska
Iowa State
Iowa
Wisconsin
Minnesota
EAST
Ohio State
Michigan
Michigan State
Illinois
Northwestern
Rutgers
Maryland
Penn State
Or if there is a God, this:
West
Texas
Nebraska
Iowa
Minnesota
Wisconsin
Missouri
Arkansas
Illinois
East
Ohio State
Michigan
Michigan State
Notre Dame
Northwestern
Rutgers
Maryland
Penn State
In any event its the BIG10 that remains in the drivers seat and all the rest, including the SEC, will be just spectators.