A few days ago, four streamers visited the Xbox Seattle offices to play Diablo 4: Vessel of Hatred. They were able to play a demo version that had portions of Nahantu not accessible so that there weren’t spoilers about some aspects of the campaign.
You could see unrestricted access of the Spiritborn class and its gameplay, and a large portion of Nahantu, which is located beneath Kehjistan. The portion beneath Hawezar was the one blocked from access.
As per game director Brent Gibson, Nahantu is as big as Scosglen in terms of square meter space.
The streamers were: