From the BSC website:
A bowl choosing a replacement team may not select any of the following:
A. A team in the NCG;
B. The host team for another BCS Bowl;
C. When two bowls lose host teams, then the bowl losing the number one team may not select a replacement team from the same conference as the number two team, unless the bowl losing the number two team consents.
Its the last one on why you will not see a Alabama/Texas matchup. Either the Sugar or Fiesta (which it would be the Sugar assuming FL is #2) would have to agree to take the lower bowl opponent.
So, If OU is #1 and Fl is #2........
Fiesta gets the first pick.....Look who is eligible:
Utah, Ohio state, Boise State, Cincinnati, and TCU. No Bama unless the Sugar allows it. No Texas tech cause of the 2 conf rule.
So if you are the Fiesta and want the best match up (and most bang for your buck), who would you pick?
So Fiesta will take OSU.
Sugar gets next pick....... with OSU being picked, they are stuck with only these choices: Utah or Cinn. (To take Texas, Fiesta would have to allow it; in which they would probably demand Bama in return
)
Now....If the final BCS standings has FL at #1.....then we are looking at a BAMA/OSU match up. Highly doubt that sugar would take BSU or TCU after having Hawaii last year.