If it really happens, then the Horizon and the Summit must merged together to become one. While the Dakota schools (UND, USD, NDSU and SDSu) and Nebraska-Omaha must choose either the MVC or the WAC.
No mergers...just raids
Big East raids MVC/A10 (for Creighton/Butler/Xavier)
MVC/A10 raids Horizon (for 3+ schools, though I think Belmont/Oral Roberts may be candidates too)
Horizon raids Summit/WAC (for 4 schools since they still haven't replaced Butler, likely the one West of the Mississippi)
The Summit might be able to keep the Dakota schools, UNO, and Denver with an option to add UND for 6 but they'll still need at least 2 more, so they'll try for the WAC schools Chicago St/UMKC for 8 and possibly UtahValley/Seattle for 10 but that may not work.
Like FSA said on another thread, the WAC may end up raiding the Summit especially if NDSU/SDSU join the Horizon. Then SDU would likely join the Big Sky along with UND.
No matter what, both the Summit and WAC should probably be on the phone with some of the upgrade candidates.
If it wasn't for the puzzling UMKC move from the Summit to the WAC we'd assume that the Summit would just cherry pick the WAC, so now all future move are really uncertain.
Fan of the Big 12 Conference, the Mountain West Conference and...