Even if the PAC is left with only Wazzu, OSU, Utah, and Arizona, it would poach
the MWC, not the other way around.
My best guess would be the PAC invites Boise State, SDSU, Colorado State, Air Force, UNLV, and Hawaii
The six MWC leftovers would probably look to add NMSU and UTEP and perhaps make their best case for Montana and Montana State to move up...and may be Idaho.