NEW ORLEANS — The one word that was thrown around all day was “unknown.” On Tuesday at the Mercedes-Benz Superdome for Sun Belt Conference Football Media Day, all eyes were on the four Sun Belt newcomers; Georgia Southern, Appalachian State, Idaho and New Mexico State. While much of the discussion between interviews surrounded the uncertain future of the Football Bowl Subdivision and the division of power between the “Power 5” conferences and the mid-major “Group of 5” conferences, many of the eyes were on Georgia Southern and App State.