Research is a very big deal to the PAC no matter what you may think.
I'm not to big on the ARWU rankings, I stick to some of the basics. Carnegie classification system and the R&D numbers of the universities.
When you dive into that information you find that every school in the PAC and the B1G are tier 1 research universities (R1). You also see that every school in those two conferences (except Oregon) are in the top 100 when it comes to their R&D expenditures. National science foundation for R&D reference.
IMO this is not a coincidence, these conferences take pride in their research and in future expansion they will do everything they can to get schools that fit that profile.
When we look at the BIGXII under this lens, I think we get a pretty clear picture of what schools they will consider 1st, what schools will need partners, and 2 schools who won't be considered at all.
Texas, Kansas, Oklahoma, and Iowa State are all R1 universities with top 100 R&D Budgets. They will be considered 1st
Kansas state, West Virginia, and Texas Tech are R1 schools and just outside of the top 100 in R&D expenditures. While Oklahoma state is #134 on the R&D list I used and an R2 university. These 4 schools obviously need one of the big boys to come with them.
I do not believe either Baylor or TCU will be considered, both are R2 universities. Baylor is #247 and TCU is #344 in R&D expenditures. They don't fit the profile of either conference. There is still a possibility that the SEC could make a run at one of these schools but they don't even necessarily meet the SEC'S standards. Only Alabama, Miss st, and Auburn are R2 universities and the lowest in R&D is Ole Miss at #147.
There are obviously a lot of metrics we can use to make a case for and against universities in the expansion game. These are two that I like.