Maybe so, but that looks like the most likely single pairing now, at 41% likely.
I redid the calculations, to account for the LSU loss.
One issue that I can't easily account for in the calculations is the Big XII tiebreaker. Should Oklahoma lose to Oklahoma State, it is unclear who the Big XII title game representative would be. Oklahoma, Oklahoma State, and Texas would be tied for the top of the Big XII South. The Big XII's tiebreakers (head-to-head, record in division, record vs. common opponents from the other division, record vs. 4th-place team in the division) would have no effect, down to the very last rule. The final Big XII tiebreaker is BCS standing, but it's pretty difficult to guess what what would be. Oklahoma would be considered the strongest team, and probably have the best computer rating, but in this hypothetical scenario they'd be coming in on a two-game losing streak.
Anyway, with the calculation assuming the Big XII South title game representative is Oklahoma, Ohio State is now at 59% to get to New Orleans. The full calculation is here:
OSU odds to BCS title game: 59%
The projected likelihood of matchups are:
41% Ohio State vs West Virginia
33% West Virginia vs Kansas
9% Ohio State vs someone else (Georgia, LSU, etc.)
8% West Virginia vs Missouri
7% Ohio State vs Kansas
2% Ohio State vs Missouri
And each team's chances to get to the title game (adds up to 200% since there are two teams going):
West Virginia - 83%
Ohio State - 59%
Kansas - 40%
Missouri - 9%
Someone else (both WVa and KU/MU winner lose) - 9%