As a Kansas alumn, I can tell you that would never happen. They are not an eastern school and are not comfortable with other eastern schools. Kansas is not worried about what OU and UT do in football, because basketball is king in Lawrence. They might consider the Big 10, but really anything east of the Mississippi is "back east". K-State wouldn't leave KU.
Realistially, the Big VII is in pretty good shape, it is the #2 BCS conference and can almost certainly poach some decent schools. As I mentioned several times, they will mostly look west. Boise State, BYU, Nevada, Colorado State, maybe TCU if UT will have them. That's my prediction: Mizzou stays. Big VII lands BYU, Nevada and Boise State.