But....Altmora is pretty much like the dead center of Antarctica. There's nothin' there.
But there is something there... land. Solitude reached Roscrea back in the 3rd Era, who knows, maybe in the last 200 years they reached Atmora and started a settlement? Land is very very attractive, no matter how inhospitable. Granted any DLC set there would be rather boring unless it's a big city with quests like in Tribunal, because, as you said, there's nothing to explore.
But frankly I'd just settle for a rough map of Atmora and Tamriel to show the distance between them, with Roscrea and (hopefully) some other small islands in-between. I don't really feel the urge to visit Atmora like I do the other "origin land" of Yokuda, because there's actually something in Yokuda to visit and explore.