Sven all but confirmed that they are making BG3 for fans of DOS2. Not fans of the original series, not fans of tabletop DnD, but for their fans whom have already purchased their previous games.
This is how I've been describing this game right from the very beginning. It is being made only for the D:OS fans and no one else. Now, I'm not saying don't try to bring in the D:OS fans. That would be silly to say. But surely it is not too much to expect that a game titled "Baldur's Gate THREE" will be made with an eye to appealing to fans of Baldur's Gate ONE and TWO.