There are so many other planes I would've rather had. Duskmourn, Bloomburrow, Ikoria, Ixalon, Kamigawa. Oh well, I wasn't planning on getting anything 2024 anyway.
Honestly? I'd rather BG4 be... not BG4, lol. Give me a 'BG' game set in Eberron or Ravenloft. Hell, give me Spelljammer or the like. Anywhere more interesting than Faerun.
I don't recall Vecna ever be a Dark Power? I know he was a dark lord for a while, until he busted out and tried to usurp the Lady of Pain. Actually, on that note, I'm curious. You guys think they'll call back to Die, Vecna! Die! ?
Planegea is such a great setting. It's something similar to what you'd think WOTC would put out to capitalize on their 'prime world' concept that popped up in Fizban's and was alluded to in the Bigby's playtest stuff. In my own spelljammer game, one of my players is a dinosaur man trying to find...
Personally, a set of books where each has updated stats for every published variant of a given creature type throughout the editions Maybe say dragon, fiend, giant, aberration?