Saw this proposed somewhere that the Big 12 just merging with the SEC or Pac-12 would do a lot more for the overall security of the Big 12 than expanding would.
SEC/Big 12
East
Alabama
Auburn
Florida
Georgia
Iowa State
Kentucky
Mississippi
Mississippi State
South Carolina
Tennessee
Vanderbilt
West Virginia
West
Arkansas
Baylor
Kansas
Kansas State
LSU
Missouri
Oklahoma
Oklahoma State
Texas
Texas A&M
Texas Tech
TCU
SEC/Big 12
East
Alabama
Auburn
Florida
Georgia
Iowa State
Kentucky
Mississippi
Mississippi State
South Carolina
Tennessee
Vanderbilt
West Virginia
West
Arkansas
Baylor
Kansas
Kansas State
LSU
Missouri
Oklahoma
Oklahoma State
Texas
Texas A&M
Texas Tech
TCU