I believe you're right. If we lose Texas State, WKU is the next man up.
Something is very fishy about all of this. It makes absolutely no sense on either side that UNLV has not already accepted an invite to the PAC. It also makes no sense for Air Force to re-commit to a depleted MWC.
I shared the link earlier that the play here is that UNLV and Air Force are hanging around specifically to force the PAC schools to cough up 143 million dollars in buyouts. Then, they would turn around and join the AAC leaving the rest of the MWC to twist in the wind. If I were Texas State, I would think real hard about accepting that invite.