Is there anything already known about the story of BG III?

Things I know:

- PC have a illithid larvae in their head
- it is set directly after the DnD PnP adventure Baldurs Gate: Descent into Avernus
- it seems to involve the Dead Three (Bhaal, Bane, Mykrul), who are according to a DnD BG DiA release interview demigods while DnD PnP Book Swordcoast Adventurer Guide still list them as gods

Is there anything I did miss?