I wonder who would it be for TGA... if you don't count any of the companies already in the Pass and the ones Vergeben disconfirmed, then Resident Evil is arguably the biggest head-turner remaining for that event imo. It's hard to think of any game or series that would get a similar reaction that Joker got last year...
Random thought of the day: what if 2B gets announced and her costumes, rather than being based on specific characters, are basic YoRHa costumes titled "B-Type" for Brawler, using the gauntlets and "S-Type" for Swordfighter, using blades, with a male and female variant of each?
Dunno, just something that came up to me. Also there was a "G" class for Gunners in the Nier lore, but I think there's no art for that one.
EDIT: Yes, I know B is Battler and S is Scanner, but the wordplay sounds exactly like something Sakurai and Taro would joke about. Plus it matches 2B and 9S.