Big 12 has a lot of starting QBs back, including every school you listed above.The big question is who from the Big 12 will be ranked in the preseason top 25 since that is one of the most important determining factors on being in position to have at large bids.
This year, preseason top 25 had Utah, Oklahoma State, Arizona, Kansas and Kansas State.
From that group, I think KSU and maybe KU make it with ASU, ISU, BYU and maybe TTU. I highly doubt CU is included without Shedeur and Travis.