The Big 12 and SEC are doing well, their teams will not leave to join the Big 10.Notre Dame is doing quite fine by itself, even though their football team has been a mess for most of the last 10 years.Pittsburgh is the most likely to me -- the Big East is not exactly a football power conference, it is teams are not playing in the high $$$ bowls like the SEC, Big 12 and Big 10(+1).