I don't see that, even though I know the ACC has explored some Pac 12 teams (as well as other teams) and found the financial potential not lucrative enough.
Geography might not matter as it used to, but it still matters some. Travel costs. The farther you travel, the more it costs. That applies to fans as well as to teams.
In this regard, as well as in others, the SEC is in the catbird seat way better than anyone else right now. At least on the map, it's a contiguous footprint that is clustered more so than spread out. Just add Oklahoma.