I don't know how the rumors got started or what the sources are I've just seen different accounts put this information out there. The rumored conference would be:

Oregon State
Washington State
Boise State (current MWC)
San Diego State (current MWC)
Fresno State (current MWC)
UNLV (current MWC)
Utah State (current MWC)
Colorado State (current MWC)
North Texas (current AAC)
UTSA (current AAC)
Rice (current AAC)
Tulane (current AAC)