Hey. I think communities for games are great, but I think you may have caught the wrong impression about BG3. While I don't think this necessarily precludes a guild from existing, BG3 isn't a persistent world, like what we've seen on NWN and what drives an MMO. It's a self-contained campaign built for 1-4 players, a more standard CRPG like the older two BG games.
Don't let me kill your hype, but I would have felt bad not at least trying to check and make sure you knew it wasn't an MMO.