Lance Reddick, who plays Sylens in the Horizon series, tweeted that he was doing motion capture work for Horizon Forbidden West.
Since then the tweet, which just said “Hard at work…in a session for #HorizonForbiddenWest!,” was deleted, but reddit user throwmeaway1784 was able to save both it and the included video.
While players were given no further clues as to what exactly Reddick is working on for Horizon Forbidden West, many assume it’s some kind of currently unannounced DLC. This would make sense given the events of the game, along with follow what Horizon Zero Dawn did years ago.