Tonight in LA is the Video Games Award hosted by Geoff Keighley. To mark this event, Xbox announced on Twitter that there will be ‘new games announcement’. This would imply that more then one new unannounced game will unveiled at Video Games Award.
Playground Games is working on a new RPG so that could be shown. It may even be a Fable game.
Ninja Theory may have a game in early stages.
Undead Labs released State of Decay 2 this year so it unlikely they will have anything to show.
Compulsion Games had We Happy Few this year so it is also unlikely they will be in a position to show something new.
343 Industries is doing Halo Infinity.
Rare had Sea of Thieves this year, so again may not be in a position to show something new.
Turn 10 Studios may be working on a Forza but that’s usually shown at E3.
The Coalition is working on Gears 5, Gears Pop and Gears Tactics.
The Initiative is still building up its studio.
Obsidian Entertainment is due to show a game at the Video Games Award but it is multi-platform game.
inXile is working on Wasteland 3.
So the new games could be the RPG from Playground Games and maybe something new from Mojang outside of ever popular Minecraft series.
At this moment this all speculation, only time will tell.