Yes. It's an EPSN league. The SEC is an ESPN league. The B1G is a Fox league. The Big 12 has a split contract 60/40.
So, the GOR gives the TV rights to ACC schools to ESPN, no matter what league they play in. Looking at Upstaters prognostication of doom, clear issues arise.
ESPN will not pay SEC rates for FSU and Clemson, because it already has that content. Fox will not give any additional $ to the B1G for content that it cannot air, and B1G schools will not dilute their payout to bring in UNC, UVA or others.
But what motivations do exist? The Pac has no contract after this season, but is split. The Big 12 is also split, details here.
Big 12 reaches new media deals with ESPN, Fox
"For the “A” package, ESPN gets the top four football picks each season, six of the top eight picks, eight of the top 12 picks and 12 of the top 20 picks. As part of the deal, ESPN also gets the rights to the Big 12 football championship game and the basketball tournament championship game."
So the logical moves align to what I said. ESPN takes 60% of the Big 12 by moving it to the ACC and paying roughly what they pay now. The rest merges with the Pac, solidifying it which would be enough to get Fox to bid on it. Fox then gets the content it could add to the B1G (UW, Oregon, Stanford, Cal) but pays much less for it.