SG1 Sports, a youtube channel that updates rosters and stats, every year they use NCAA 14 with updated rosters and stats and run simulations just for fun.
This year, it had Nebraska going 10-2 with losses to Oklahoma and Michigan. There simulation had Oklahoma winning the national title over Ohio St. Nebraska was Ohio Sts only loss on the season and they redeemed themselves in the B1G championship game against Nebraska to make the playoff.
IIRC, the simulation had something similar in that Oklahoma lost to ISU I think, but beat them in the Big12 championship game. Then OU beat Clemson and Ohio St beat Bama in the first round.