There won't be any additions, ESP will not agree to them nor will most, if not all, ACC schools. Let posters have their fun. However, the GOR is too expensive to buyout and there is no incentive for ESPN to let any of the ACC schools go. This has been discussed on this site and at present it will be in excess of a billion dollars to break the GOR, assuming ESPN agrees to allow it.
Even in 2031, there will be too many years left for schools to buy out the GOR. And yet, ESPN will still have no interest in allowing the ACC to collapse. It is more likely that ESPN will be thinking of merging the SEC and ACC than to breaking up the ACC and letting schools go to the B1G and giving up the northeast completely, the markets are too valuable to have no ESPN footprint. As it is the B1G and Big East belong to Fox covering the two profitable sports. It is bad business to simply give a competitor profit generating properties.
Further, no talking heads have done basic math, though ESPN, Fox, and the conferences have. The SEC will have several of big name schools becoming middle of the pack and many middle of the pack fall to losing records, even when they have a 4-game OOC schedule. Saban is not a fool, he knows this, as do the SEC voters, which explains his adamant argument for 4 OOC games in lieu of three. The one extra OOC game provides a little breathing room to prop up a couple more teams. Conference play is a zero sum game, and inflation of records for the middle and bottom must come from outside the conference.
Before arguing with me, do the math and present it here. There is no mathematical possibility that Bama, LSU, UGA, UT, TAMU, OU, UF, Auburn, and Tennessee in which they are all top 25. In fact, at least one will become a loser each year, probably more than one. Nor will all of the former middle of the pack be happy being perpetual losers. No one will care that Ole Miss, MState, USC, Arkansas, Mizzou (east, not Rutgers - inside joke, a Rutgers fan once claimed Rutgers was USC on Saturdays) is in the SEC when they can't win 6 games annually. Only UK and Vandy will remain unscathed because they historically are the SEC bottom feeders of the SEC.
The same is true in the B1G, just different names. Both conferences will either have to split for the biggest names to have annual success that they are accustomed to, or more likely, both expand to include more middle of the pack and a couple bottom feeders to prop up the biggest names.
Again, before you whine and complain in an attempt to convince us that the SEC is all that and a bag of chips, do the math, show your work and prove absolutely that your response will work. As it stands, it won't. By 2031, everyone will understand this point.