i'd throw in sec split from socon. socon was a super conference similar to what it feels like we're heading towards today. 23 schools, and most are top half p5 teams. bama, au, lsu, fl, tenn, uga, clemson, ga tech, virginia, va tech, kentucy, vandy, unc, nc state, maryland, ole miss, msu, duke, and usc were all in socon.
that looks like a not unrealistic version of something we could end up with in near future.
sec split off for a couple of different reasons, but travel, admissions, and athletic budgets were all part of the decision.
i could see a reality where that split doesn't happen, and the b1g/pac combine similarly, and we end up with an american/national divisional setup like nfl/mlb. have the rose bowl/sugar bowl for div champs and then a +1 superbowl type game for cfb. at the time, college sports were much bigger than pro, too, outside of mlb, so could see this being the dominant sport.