Yawn.......this is not BG 1& BG2 - its not trying to be - leave those games in the past they are classics & everybody knows that (boy do we hear about it enough..)
Yes it has BG3 as a title its based (largely) in balders gate & follows a story 100 years later ....this is not trying to be a sequel to the other 2 games - its drawing on the influence of those games & yes it is a bit of marketing there but this is a new vision - the 3 games can exist in the same world setting.
Did....did you actually *play* the BG series?
If you did, you'd know that BG 2 never even goes to Baldur's Gate. It's set primarily in an entirely different city, as well as numerous other locations along the Sword Coast and then straight up into other planes of existence. But it's still a BG game.