User blog comment:IceFireWarden0/Elder Scrolls VI- An Analysis/@comment-71.100.112.141-20130609001310

Hammerfell was already used as a region in a previous game. Black Marsh or Elsweyr are more likely, as neither have been fully utilized. Also note that the letters of each game's title have contained the Roman numeral of that game's number in the series, the V for 5, was in the top of the Y in Skyrim.