Activision Blizzard has set a timer for the revelation of its next Call of Duty game, which rumors suggest will be called Call of Duty: Infinite Warfare.

The timer, released through social media, is set for a revelation at 9 am Pacific time on Monday. The countdown is one of multiple teasers for Infinity Ward’s new Call of Duty video game coming this fall. The Infinity Ward game will be the newest installment in a series that has sold more than $15 billion worth in the past decade.

The teasers started on Friday with the release of a new logo, and then an image of a big spaceship at the end of the Nuk3town multiplayer map in Call of Duty: Black Ops III. The teaser appeared during a match with Karl-Anthony Towns on Twitch. More teasers appeared Saturday in the form of an audio file from a bald, armored soldier making threats about how “we will rip you from the history books.” The soldier, “We will bury you in darkness. We are your enemy. We are the Settlement Defense Front.”

And today, social media fans uncovered a new video, dubbed “We can still fight back,” embedded below.

Activision’s Infinity Ward is making the new version of Call of Duty, which will likely debut this fall. The imagery certainly suggests a sci-fi-like version of the military shooter. Infinity Ward has hired a couple of narrative writers and game designers, Taylor Kurosaki, and Jacob Minkoff, from Sony’s Naughty Dog studio, the maker of the story-driven blockbusters The Last of Us and Uncharted. The revelations so far suggest that Infinity Ward has taken some lessons from Naughty Dog and put more emphasis on dramatic story elements.

Infinity Ward’s previous game, Call of Duty: Ghosts, caught a lot of flak for a somewhat absurd story, and it was one of the rare weak installments in the series. In this video, a new character, Lieutenant Reyes, broadcasts a message in opposition to the Settlement Defense Front. You can bet that the countdown will lead to an event that shows off the content of the next Call of Duty game.

Update: Infinity Ward also released a behind-the-scenes video of making Call of Duty games as well. Infinity Ward will conduct a special video stream at 10:30 am Pacific time as well on Monday.