All those arguments about it not being BG3 flying around these formus and I have yet to find a person to actualy explain why. So let me try here: OP, what exactly should be made for it to be a Baldur's Gate 3?
It should use AD&D rules obvs, despite them being 2 editions out of date. And be in 2D, because, technology, FECK technology. And continue the Bhaalspawn story, despite it being concluded in Throne of Bhaal.
This!
Exactly Neverwinter Nights 2 wasn't a direct sequel to NWN1. Nor did they use the same rule edition. Icewind Dale II wasn't a direct sequel to Icewind Dale. Again they switched to a later edition of the rules.
So anybody who tries to say it isnt BG3 is making a redundant argument.
It is set in and around the city of Baldur's Gate. That is all that is needed to make it a Baldur's Gate game.