If this is in any way true, and I don't believe it is, then it immediately brings back that pesky question of why even bother to call this game BG3?
People can be aware of the brand and interested in it without have played the originals. Or without remembering all the details of their original playthrough.
For instance, I played the original so many years ago that I don't remember much about the character I played. I recall some big scenes and maps and a handful of NPCs, but was I originally a wizard, a fighter, a rogue? I don't know.
Not to mention, I played more than once with different characters.
None of that changes my interest in playing BG3. I still remember the basic plot thread, and even if I didn't, it's easy to read up on and learn about in the BG3 community.
Obviously, I don't have any marketing information at hand, but I think my opinion is reasonably grounded.