The Southland Conference has announced the addition of TAMU-Commerce
Other schools I could see joining the SLC are Delta State and West Alabama of the Gulf South Conference, and West Texas A&M of the Lone Star Conference.
The Ohio Valley Conference could add Chattanooga and ETSU from the SoCon, Kentucky State from the D-II SIAC, Carson-Newman and Tusculum from the D-II SAC, and Kentucky Wesleyan from the D-II GMAC (they have football, but would be primarily added for basketball).
I've also now proposed the Horizon League become 16-team, as follows:
East: IUPUI, Michigan-Dearborn (new member), Morehead State (new member) Northern Kentucky, Oakland, Pitt-Johnstown (new member), Purdue-Fort Wayne, Wright State
West: Chicago State (new member), Green Bay, Kansas City (new member), Milwaukee, Omaha (new member), SIUE (new member), UIC, UMSL (new member)
This would remove all of the OVC schools from that conference that do not play football in the conference. While Morehead State has football, it isn't a scholarship program like the OVC's are, instead playing in the Pioneer League.
With all the membership changes in the OVC, plus the elevation of ASUN football to FBS, it would give the OVC a monopoly on FCS football in Tennessee, although it would still have three members in Kentucky (two of them new).