I thought it a bit strange to announce this to be honest, it didn't really tell you anything about the game other than it's set in the same Divinity world we have seen up to now presumably. It didn't tell us the style of game, is it a Witcher / Elder Scrolls style game or in the same vain of Divinity original sin or Baldurs Gate.
It was just a cinematic which could have come from anything really.