If UNO's and UALR's future doesn't involve the Sun Belt, they really have only two options:
1. Join the Southland. Two schools upgrading to FBS in football will create the perfect opportunity for the Southland and Sun Belt to swap schools. The Southland might balk at losing two football-playing members, but UNO and UALR would be available on short notice-unlike a Division II school. If enough Southland members upgrade to FBS to establish another FBS conference, this might not be an option.
2. Join the Summit. The Summit gets two Division I core members, and ironically, doesn't extend their footprint. UALR would be a tight geographic rival of UMKC, ORU, and Centenary. The league would also have a presence in two of Louisiana's three largest cities.
Down the road, the Summit could swap Southern Utah, North Dakota State, and South Dakota State for Houston Baptist, UTPA, and NJIT. The leagues would come out looking like this:
Great West (*counts for 6/5 compliance)
Southern Utah/Utah Valley*
North Dakota*/North Dakota State
South Dakota*/South Dakota State
Denver*/Seattle* (assuming they join)
Summit (*counts for 6/5 compliance)
North - UMKC*, Western Illinois*, IUPUI*, IPFW*, Oakland*, NJIT
South - Centenary*, New Orleans, UALR, ORU*, Houston Baptist, UTPA
At this point, NJIT wouldn't even be necessary and could be substituted with a school more in line with the division's footprint (perhaps an upgraded Bellarmine, Northern Kentucky, or Illinois-Springfield). The catch is getting Denver and Seattle to join the Great West (preferably before 2013) so the conference will have more than 6 members who have been together for 5 years and be able to participate in the swap.