The Big 12's end of days are at hand. The last two days, Colorado and Nebraska launched their exit strategies. Now, it's up to Oklahoma and Oklahoma State to formulate theirs. Colorado became the first school to leave the Big 12, announcing Thursday it had agreed to join the Pac-10. Next will be Nebraska, expected to declare today it's bolting for the Big Ten. Despite a Kansas City TV station report that Texas and Texas A&M are going to the Big Ten, and OU the SEC, multiple sources continue to maintain to The Oklahoman the Sooners and Cowboys are Pac-10-bound, along with Texas, Texas A&M, Texas Tech and Colorado. OU and OSU must begin to explore how to get out of the Big 12 and how much it will cost — a process that could become both complicated and litigious. According to the league's handbook, Big 12 schools must give two years' notice and forfeit 50 percent of their conference revenue if they intend to leave. Those buyouts increase if schools leave within the two-year window. That shouldn't be an issue, since Pac-10 commissioner Larry Scott declared during a press conference Thursday that competition in an expanded Pac-10 wouldn't begin until 2012. Still, the buyouts could become problematic and lead to severe infighting in the league's final two years of existence. OU and OSU could avoid paying any buyouts, which would save both schools $10 million apiece, if the Big 12 dissolved altogether. For that to happen, nine of the 12 schools would have to vote to terminate the conference. It's pretty clear which way Nebraska, Colorado, Texas, Texas A&M, Texas Tech, OU and OSU would vote. What's not clear is how Baylor, Iowa State, Kansas, Kansas State and Missouri would vote. Would those schools also bail and seek membership in other leagues? If so, no one would be left to collect the buyout checks. But if those schools all chose to remain in a reformed Big 12? A courtroom battle could ensue, if the departing schools refuse to pay up and the remaining schools refuse to give up. All of which could lead to a contentious end to the Big 12. On and off the field.