If CUSA expands SFA would be my guess unless UMASS wants to join CUSA for all sports.
Missouri State moving to that league would be pure desperation. It's a downgrade across the board. Unless it's a Sun Belt offer I doubt they bite.
Can't see Samford, Furman, or Chattanooga. Downgrade in hoops and they'd have to pay a $2M SOCON exit fee on top of a $5M FBS entrance fee.
EKU would love it, but I'm sure WKU will do everything they can to block them.
FAMU. Can't see them leaving the SWAC and can't see an FBS league being interested in a SWAC school enough to invite them.
Tarleton State. Maybe right behind SFA in the realistic pecking order, but they are still very new to D1.