The reveal for the next Call of Duty game is imminent. Activision has laid out plans to reveal the Sledgehammer-developed game on Sunday, with both a trailer and magazine coverage. Right now it's simply being called "a new era of Call of Duty."
A teaser site (via Polygon) is counting down to 10 AM ET on May 4. Meanwhile, Game Informer has already said that the next Call of Duty game will be the subject of its June cover story, so it is timing the digital release of its next issue to coincide with the trailer. That will probably provide more info than the trailer itself, but for now it has shared a single screenshot.