Well, the cat is out of the bag.  JBGR has a brochure (pdf) out stating that local southern cuisine chain The Carolina Kitchen and Subway will be part of the Fort Totten Square development anchored by a 120,000 square foot Walmart.  TKO Burger, a concept developed by the same owner as the Carolina Kitchen, will also be part of the development according to the TKO Burger website.  The Carolina Kitchen & TKO Burger will occupy the space on the corner of Chillum Place NE and Riggs Road NE.  That leaves one retail location of around 1700 square feet available for lease on the corner of 3rd Street NE and Riggs Road NE.