Instead the game will have an intense and expanded focus on they multiplayer mode, as well as the ever-popular Zombies mode.
Whether work is continuing on the single-player campaign, perhaps for release as DLC at a later date.is unclear. They added this same source also told them in place of the story mode would be a battle royale mode. "We look forward to revealing Black Ops 4 on May 17th".
Instead, there will be a Black Ops 4 Battle Royale mode. And what better way to distract people from the loss of a campaign than leveraging the most wildly successful game genre to come along in years? However, we don't know whether the development of a campaign has been halted or only postponed until after the game's release. Because of this, it was mentioned that Treyarch chose to instead focus on both the multiplayer and the zombies portion of the gameplay, making the cooperative experience more even more emphasized. It doesn't make a lot of sense to launch without a single-player mode when the Black Ops series has traditionally had one of the more lauded storylines in the Call of Duty franchise.
According to the site's alleged report, Black Ops 4 is nearing its release date and the single-player campaign was nowhere near completion.
Some additional info from that same tipster stated that Activision believed that Call of Duty: Black Ops 4's campaign was "too out there" and "outlandish" and cancelled it to let Treyarch focus on MP and Zombies. If there is indeed no single-player for Black Ops IV, we are left to speculate on the exact reasoning.