The way I see it there are 6 teams competing for the last two 2 seeds. The teams locked in to the 1/2 lines are Duke, Auburn, Florida, Houston, Alabama, and Tennessee.
That leaves us, Michigan State, Texas Tech, A&M, Wisconsin, and Kentucky with a realistic chance at the last two 2 seeds.
The thing is, the committee has shown that they essentially don't factor in the Saturday and Sunday games it regards to seeding. I think they lock the seeds in early Saturday and then the rest of their time is spent on contingencies for potential bid stealers for which there will still be the risk of going into Sunday. If Memphis makes the AAC championship game, which begins at 3:15 on Sunday, the committee will have to make two brackets - one for if they win and one that includes the bid stealer if they lose. They definitely won't be doing that in addition to adjusting the seeding based on the results of the SEC and B10 Champ games that also happen on Sunday afternoon.