User blog comment:Atvelonis/E3 2018 Coverage and TES VI Teaser/@comment-1622149-20180611195445

The game is in pre-production meaning it not being in develoment yet, the land shown in the teaser would not look the same as the game.

From the teaser it does look like either High Rock or Hammerfell but it possible Bethesda havent decided the province placement yet.