If we're doing dream scenarios with a Big East break up I'm going to say the Big 12 restructures. Kansas, Kansas State, Iowa State and Baylor are left. Mizzou goes elsewhere. The Big 12 than goes after BYU, UNLV, New Mexico, TCU, Memphis, Louisville, Cincinnati and Tulsa. That brings them back to 12 football schools. Then they decide to go to 16 for basketball and add Wichita State, Creighton, Butler and Marquette.
Or if it were a midwest basketball league with football playing members in some other league, I'd go with Wichita State, Tulsa, Kansas, Kansas State, Creighton, Missouri, Dayton, Butler, Xavier, Missouri State, Memphis and Louisville.
West:
Kansas
Kansas State
Wichita State
Creighton
Tulsa
Missouri State
East:
Missouri
Dayton
Butler
Xavier
Memphis
Louisville
ORRRRRRRRRR I could go with Wichita State, Kansas, North Carolina, Kentucky, Duke, UCLA, Arizona, UConn, Michigan State, Texas, USC and Hawaii.