Ooohhh, let’s try anyway. With that phrasing, Bethesda and Obsidian are certainly out. Larian, while fun to think about, also seems too sensible a guess to me, and they’re probably busy enough for the foreseeable future. I think it’s most likely a western AAA (maybe AA) developer, and not one that would tie the game to a specific platform by default.
A plausible guess that I kinda hope is not correct: Ubisoft
Some unlikely-but-god-can-you-imagine guesses: FromSoftware, Team Ninja or Kojima Productions
And my actual guess, the one that counts for bragging rights if it turns out to be true: Crytek!
I think they have the chops to make a game visually high-end enough to please the marketing people. They haven’t really done an RPG, but have strayed from first person shooters enough in the past that I think this wouldn’t be an impossibility for them. And they’re certainly not a studio you would guess for such a game, even though I just did
So, any more out there guesses?