http://www.neoseeker.com/news/21887-cd-projekt-red-february-5-announcement-teased-in-cyberpunk-2077-trailer-likely-witcher-3/

"And that's not all that's new. We are about the reveal our other project which is much closer to being completed and yes, it will also be a fully open-world game with an intense story. You can probably guess the game we're talking about :-) On the 5th of February it will all be clear."