I could still see some type of merger between the ACC BIG 12 and pac I the future where the bottom of each of those conferences are left out. That is the only way to get a conference close to the the Big10 and SEC revenue. Coast to coast with Clemson, Florida state, Oregon, TCU, Washington, Utah, Oklahoma state, Kansas or Kansas state, North Carolina, Miami, sounds like a pretty good top of conference.
I think you're eventually (circa 2030) looking at around four current members of each of the ACC and Pac ending up in the Big 12(20-ish), while the biggest brands/state R1 institutions (Oregon, Washington, UNC, Virginia, FSU, Clemson, etc.) go to the Big Ten and SEC.
But predicting these things is always a fool's errand and usually descends very quickly into tedious self-publication of fantastical maps. What you can say for certain is:
1. The evolution of the college sports landscape will continue apace; it is far from finished.
2. The Big Ten and SEC will be fine, every other conference has many reasons to worry and could be left behind. No conference, and very few individual schools, outside of those two leagues is/are safe for sure.
3. The Big 12 needs to win the struggle to be in the best position behind those two leagues for right now. This isn't necessarily a death-struggle/cage match vs. the Pac and/or ACC right now, but it might become that at any moment and we need to be ready.
4. We have to monitor the landscape continually, be nimble and take nothing for granted.
A lot can change. The Big 12's reversal of fortunes since 2021 has been remarkable, but it could swing back the other way in a hurry. For right now, I'd say Yormark has been a very good hire. Maybe it's him, maybe it's the institutions he represents, maybe it's both... but I think Kliavkoff has played a weak hand disastrously so far. He may have a pair of aces he's about to show, but it sure feels like he's an arrogant clown who got caught out by putting his faith in California politics. He was pickpocketed while looking the other way, now he's trying to bluff his way out of a very tight spot.