What's most important when it comes to what this game is called is that WotC calls it Baldur's Gate III and specifically advised Larian to make a Baldur's Gate III.
Of course,WoTC can make a hello kitty game with a sarevok helmet and call it BG4 but that is a dishonest cashgrab and not a proper ''next installment of the franchise'' (Even if for all term and purposes i canon BG4)
