I have come to believe that UT, Tech, TCU, OU and Ok St. will all leave the Big 12 and go elsewhere in 4 or 5 years.
I think UT, Tech, TCU and BYU end up in the PAC 16 and form the PAC WEST Div along with Utah, Colorado and the AZ schools.
OU and OK. ST go to the Big 16. UT keeps it's yearly game against OU. Kansas goes to the ACC along with ND. Baylor, K ST. and Iowa ST. get left behind.
I know that it's all anyone's guess what might or might not work, but I'm not sure I follow the logic. OU and OSU going (by themselves) to the look-down-their-nose-at-you academic conference? TCU and BYU getting the invite to the least-likely-to-invite-religious-schools conference? The Pac 12 adding 4 teams but only 1 state?
I agree with you that the Big 12 will probably break up (though, I'm not sure about your timeline. If I understand it correctly, you'd need to get 8 teams to agree to even start to unbind the GOR before it ends in 2025), but the destinations will probably be a little different, I think. When I think of these things, I start with Texas both because I'm a fan and alum so of course that's my priority, but also because it's the biggest prize for other conferences expanding at this point (as long as something can be worked out with the LHN). Next is OU, who is also a pretty big prize. With the two of them, one of two things can happen: either they stay together or they split up.
If they split up, I think it's almost 90% because they're headed to the SEC. That's not even just because Texas has an aversion to joining the SEC. It's more because the SEC has the best argument to make that they could take OU and not reallyreallyreallyreally want to get Texas and OU as a package deal. Now, despite what our SEC visitors might imply sometimes, I think they'd take Texas and OU together in a heartbeat (and, I mean, if the SEC weren't so shady it could actually be kind of fun. Imagine them adding Texas to the west, OU to the east... though maybe renaming them south/north at that point... having Texas and OU be permanent cross-divisional opponents, while being in the division where we'd get to smack around our old buddies, Arkansas and A&M, every year too?). I'm not endorsing this idea by any means. I think there are more problems to it than it'd be worth, but I can understand the appeal. Still, with A&M already in, the SEC would probably be fine taking OU and Kansas, or OU and Virginia Tech, or OU and NC State, or even give in on the 2-in-one-state thing and take OU and Oklahoma State.
On the other hand, if they stay together I think that both the Pac 12 and Big 10 would be even more interested. The Pac 12 would love to have both schools and be willing to take some tag-alongs in OSU and Tech to get therm. That still seems like the ideal combination from the Pac 12's perspective in that it brings in more schools that fit what the conference already looks like, makes sense for them geographically (as much as anything will at this point), helps them expand, and helps them fix the issues with their TV money issues. It also avoids any of the issues that might arise if the state of Oklahoma is adamant that OSU is tied to OU and if the state of Texas is concerned about Tech finding a landing spot. Of course, if they could get Texas, OU, someone and Kansas they might prefer that, but it seems like they'd be fine if that answer was no. From our side, I know there will always be some Texas and OU fans that raise concerns about TV visibility, timing of games, and travel distances. Well, based on history, the first two shouldn't be that big of concerns. When the Pac 12 plays teams from the Central or Eastern time zones it almost always means an earlier start time. And when big teams face off, the bigger networks will still want a chance to show it. The travel concern (for the non-football sports, since football would really only end up playing a game or MAYBE 2 on the west coast per year) is a realistic one, but I think the only real solution there would be for teams like the baseball or softball team to balance things out by having more localized OOC games. I mean, right now, Baseball typically has a 1 to 2 series on the west coast each season. Now those will be conference games, so you just change the focus to having more OOC series with teams in the Texas/New Mexico/Arkansas/Oklahoma/Louisiana area for now. Plus, as we've seen, lots of northern teams are happy to just play a series in Austin at the beginning of the year without needing a return date. And you do things similarly with other sports.
The Big 10 is an interesting situation. I think they'd be fine with taking Texas and OU. I think they MIGHT be ok taking Kansas and OU. I don't think they'd take OU and OSU without anyone else. By themselves the two schools don't tick almost any of the boxes for the Big 10. They aren't AAU. Bringing in the two of them just brings in 1 state, not 2. The have shown they're willing to take a less-populous state (Nebraska) for a school with a lot of history before, but you can't tell me that they wouldn't like to balance out the population between their eastern and western divisions a bit more too. They'd have questions about the schools' involvement with the CIC. I just don't see it. But yeah, definitely Texas and OU, and quite possibly OU and Kansas. Beyond that, though, the Big 10 was the conference that didn't seem to really care about the idea of a 16 team ceiling. I could see them saying, what the hell, and trying to take Texas, OU, Kansas... and then checking in with Notre Dame, UVA, Georgia Tech, and maybe even Vandy, but being prepared to go with someone like Rice or Tulane if it came down to it. I don't think their current model would prefer taking 2 teams from any new states, but the state of Texas (and the opportunity for more teams to get a conference game in the state for recruiting purposes each season) would potentially be the exception to that rule. If they took 3 Big 12 teams and 1 team that fit into the East (like Notre Dame, Virginia, Vandy, or Georgia Tech), the conference divisions work out pretty nicely too).
The ACC is the only conference I really don't know what to do with as far as either Texas or OU (or both together). I don't really see Texas wanting to join a conference that far away by themselves (even if it was part of a deal to get Notre Dame to join with them and be a permanent rival). I'm not sure I'd see them going beyond 16 members (which basically only leaves 1.5 spots left... or 2), and even if they did go to 18, there isn't a really nice way to divide up the conference that would make everyone happy (where as, that all works pretty nicely with the ideas I've shared for the SEC, Pac 12, and Big 10). I'm not saying it could never happen for either or both schools, it would just make for a much more chaotic realignment.
Anyway, I basically think Texas will end up in the Pac 12 or the Big 10, and that there's a better than 50% chance OU will end up there with them, barring things getting really messy between the two schools in the meantime (and I don't mean on the field). If they don't, I think it will involve OU going to the SEC.