As of right now...
As of right now, the Big 10 has 12 schools (Nebraska just joined), the Big 12 has 10 schools (Nebraska and Colorado left), and the Pac 10 has 11 schools (Colorado). The rumors are that Texas, Texas Tech, Oklahoma, Oklahoma St, and Utah will join the Pac 10 to make 16 teams. Texas A&M is rumored to join the SEC and make 13 schools. That leaves Kansas, Kansas St, Missouri, Baylor, and Iowa St in the remains of the Big 12 conference. I would think that the SEC would want 1 more team (to get an even number of teams) so maybe they would take Baylor. If the Big 10 can get Notre Dame and get up to 16 teams, that would be the only scenario where they would take Missouri (not the others). They would also (most likely) want Syracuse and Rutgers to make the 16 team conference. About the only thing for the other 3 would be to join the Mountain West and make that an 12 team conference (it's 10 right now - Boise St joined a week or so ago), which would go down to 9 if Utah leaves). There...