Before launching Call of Duty: Warzone as a standalone multiplayer-only title, Call of Duty: Black Ops 4 was the very first entry of the series without a story-driven campaign. However, regarding the latest leaked video from the game's canceled campaign's gameplay, it seems Treyarch had some plans for a story-driven experience, though it hasn't survived the development process.

Despite lacking a single-player campaign, Black Ops 4 managed to bring a solid and fast-paced multiplayer experience, along with the series' first Battle Royale mode. However, even with great success in the multiplayer section, some of the old fans of the franchise still can't forgive Treyarch for delisting the campaign mode. That said, recently it's turned out that Treyarch actually did have some ambitious ideas for a story-driven mode in Call of Duty: Black Ops 4, but it just didn't fit in the schedule for the game's launch.

According to the leaked gameplay footage of Black Ops 4 on Reddit, we get to see a mission that we haven't seen in the final version of the game so far. As the video shows, the objective is to "Find The Aquilus CEO" which seems to be a story-driven mission that never appeared in the final build of the game. It's yet-to-be-known what was the actual storyline behind the canceled campaign, and how Treyarch decided to exclude it from the game.

In 2019, Call of Duty: Modern Warfare somehow managed to cover the lack of story in Black Ops 4 by ignoring the Zombie mode and bringing Captain Price back in a brief story that's worth to give it a shot. That being said, the series' progress in multiplayer with Modern Warfare and Warzone is too outstanding compared to what Infinity Ward did in the campaign mode.

The upcoming mainline title in the COD franchise is rumored to be a soft reboot of the Black Ops series set in the Cold War era.