WoTC owns the Forgotten Realms and the fictitious city of Baldur's Gate, and they are working closely with Larian in all aspects of this game. Calling this a marketing ploy is an insult to every WoTC employee that is working with Larian to ensure that the game is true to D&D, Baldur's Gate, the Baldur's Gate story, etc.
Well, WotC has been insulting me for years now, with what they have done with the 4e and 5e versions of D&D, slashing and burning the FR setting, killing the FR novels, etc. So I have zero concern about insulting WotC right back. They are free to try and earn back my trust and my support, but going by BG3 I don't see this happening. They have written off all of their old(er) fans and now care only about their new fans (even though we older fans are the ones with any real money). So be it. I just hope I live to see the day when today's new fans are tomorrow's old fans who get to enjoy their turn getting thrown under the bus.