Had another thought about this regarding brands.
Of the top 20ish brands in football, SEC and B1G have probably all but maybe 3. That gives them power to drive ratings - and thus demand a bigger payout (ie negotiation leverage)
If you put the B12 and BE together, you gather a lot of brands under one negotiation umbrella. You would have maybe half the top 20? With the others split around the ACC and B1G. Also Kentucky. It would give you leverage to get a better payout, and you could also own the "challenge" type marquee matchups and pre-season tournaments. Imagine putting Kansas, Arizona, Syracuse, Gonzaga, Nova, UConn, Baylor, all in a 4 day 3 game tournament up for bid. And being able to market those matchups thru the season.
And going another step to the future - it might be a magnet for ACC basketball schools once available. You won't outbid the B1G for UNC or SEC for Florida St, but MAYBE it helps nudge a Duke, or Pitt, or NC State your way.