Henadic Theologian
Legend
You totally called this last week, too, though this is faster than I think you were speculating.
Exactly.
Here's a link with some more details.
What Happened in Magic Showcase 2021?
"The debut of Dungeons & Dragons: Adventures in the Forgotten Realms brought a mix of Magic and D&D to life in amazing ways—with many more stories and characters from the Forgotten Realms to share. Focusing on the city of Baldur's Gate and building on the Commander-first gameplay of 2019's Commander Legends, our return to Commander Draft with Commander Legends: Battle for Baldur's Gate brings in iconic characters, new mechanics, more flavorful spells from D&D, plus Commander Legends-style foil-etched legendary creatures—all packed into an even greater social experience.
Be ready when the battle begins in the second quarter of 2022."
Note the Nautiliod in the art floating above Baldur's Gate. That basically confirms a Nautiliod vechile card.
I'm betting we see some characters from BG3, Shadowheart, Gale, etc..., this set will likely have a solid tie into BG3, but that doesn't mean only stuff from BG will be in it. Prediction, Gith creature type.
Plus hopefully some more classic characters like Dragonbait and Elminster, maybe Mystra too.
I also suspect we will see the Dead Three in the set.
For none basic lands I suspect there will be Ward Lands, a set of Land each based on one if the Districts/Wards of Baldur's Gate. I think they will be two colours like Guildgate, but it will depend on if your Commander is in play as to if they come onto the Battlefield tapped or not. Plus maybe they will have ward 1 or some minor effect.