(assumes Iowa State finishes off BYU)
Remaining Opponents:
Texas - @ISU, TTU
Oklahoma State - @HOU, BYU
Oklahoma - @BYU, TCU
Kansas State - @KU, ISU
Iowa State - UT, @KSU
Okay so let's say Texas wins out (yes, I know) and Kansas State also beats Iowa State at home after beating Kansas. Oklahoma and Oklahoma State win out. Then we have (assuming favorites win elsewhere):
Big 12 Tiebreakers:
So in the above scenario which assumes a lot of results let's go through the tiebreakers.
1. Does not apply. Oklahoma did not play Kansas State so per the rule we move to Step 2. Note that this is really stupid because Oklahoma State beat both of them but that's the rule as written.
2. West Virginia is not a common opponent as they did not play Kansas State. Iowa State at 5-4 is a common opponent. Texas Tech at 5-4 is not a common opponent (did not play OU or OSU). Kansas at 5-4 is a common opponent. Against Iowa State and Kansas, Oklahoma State went 1-1, Oklahoma went 1-1, Kansas State in our scenario goes 2-0 against those two teams in the next two weeks.
In this scenario we play Kansas State in the championship game because the Big 12's terribly written tiebreakers rip off Oklahoma State. I expect that if this scenario becomes a serious possibility heading into the last week we will see clarification from the Big 12 office on tiebreaker 1 if one team has beaten all other teams they're tied with.