Seems almost as if Texas & Oklahoma are kind of waiting for the Big XII GOR deal to expire, and then they would look at their options, whether that be a new conference, or staying in the Big XII.
From what you read online (I highly recommend Frank the Tank's blog
https://frankthetank.me), it seems like the powers that be at Texas & Oklahoma are about the Big Ten; Texas because it's the best combo of academics & athletics & a better geography fit than the Pac or ACC (especially BC/Syracuse/Pitt), and Oklahoma because they want to enhance the reputation of their university and become known for more than just a football factory. You throw in those 2, along with Kansas, I'm guessing the Big Ten could probably get Missouri as well because, as well as they're enjoying the benefits of the SEC, some thought is that they'd still prefer the Big Ten, and being involved with some of their old conference mates may be just too good to pass up.
Which then presents a problem to me, as a Minnesota fan; clearly the conference would go geography and we'd be in a division with all of those new schools. As much as I respect those schools and their programs in their specific sports, it's almost like us, Wisconsin & Iowa would now become more of a "Big 8" school in terms of sports as we wouldn't see some of the Big Ten schools as much as in the past. Personally, I don't have a ton of personal loss if we were to lose out on playing Ohio State instead of Texas & Oklahoma, I would miss playing Michigan a ton. I don't know if there's a good solution to this though, if expansion is inevitable and the Big XII were to lose their power schools. At least there's a few years to figure it all out....