As the old adage says, "that's why we play the games"!
Personally I believe LSU will get the job done and play in the national title game. They have a tough game against the No. 6 Arkansas Razorbacks on Nov. 25 and then they will most likely play the No. 14 Georgia Bulldogs in the SEC Championship Game. Both are very winnable games for LSU, so pencil in the Tigers in the national title game.
Oklahoma State is a different story. They have a date with the No. 5 Oklahoma Sooners on Dec. 3, which is no walk in the park. Although it's a home game for the Cowboys, I believe the Sooners will prevail and dash all of Oklahoma State's national title hopes. But without the luxury of a Big 12 Championship Game this year, it'll be hard for the Sooners to make a move in the polls and muscle their way to the No. 2 ranking.
So that leaves us with the No. 3 Alabama Crimson Tide and the No. 4 Oregon Ducks. They are neck and neck in the polls as only a few points separate them from the #3 and #4 ranking. They are also joined at the hip as their only loss has been to #1 LSU. As I expected, the Ducks made their move back into the Top 5 and back into the national title conversation by crushing the then-undefeated Stanford Cardinal, 53-30, on the road. The loss pretty much eliminated Stanford from the national title conversation. For the Ducks, unlike Alabama, they have the luxury of a conference championship game which (if they win) will earn them enough ranking points to leapfrog Alabama. Unfortunately for Alabama, if LSU runs the table there will be no SEC Championship Game for them.
So the Oklahoma State-Oklahoma game is extremely huge right now because it'll decide OK State's national title destiny and open the door for Alabama and Oregon.
If the voters want to see a rematch between Alabama and LSU then it wouldn't surprise me if the computers are tweaked in Alabama's favor. But if Oregon wins the Pac-12 Championship Game, it's going to be extremely difficult to deny the Ducks.
So in my book, it'll be LSU and Oregon for the national title in a rematch of their Week 1 showdown, which LSU won 40-27. That is, of course, if Oklahoma beats Oklahoma State.