I know the clear Big 12 frontrunner lost in the CCG more than once during the BCS era - bouncing that frontrunner from the BCS championship.
Georgia over Alabama/MSU could ruin the SEC's bid
Wisconsin/Minnesota over Ohio St. would bring the B1G down
UCLA/ASU/Arizona over Oregon might be enough to keep the PAC 12 out
Georgia Tech could crash Florida St.'s party
Meanwhile, the Big 12 could be left standing with TWO teams set up for the CFP