https://www.polygon.com/2018/4/17/17248230/call-of-duty-black-ops-4-single-player-cod-blops

Call of Duty: Black Ops 4 won’t include a traditional single-player story mode, according to sources with knowledge of the project’s status. The shift in creative direction will make Black Ops 4 the first mainline Call of Duty to ship without a standard campaign.

When reached for comment, an Activision spokesperson said, “We don’t comment on rumor and speculation. We look forward to revealing Black Ops 4 on May 17th.”