From GI.biz: “The success of Call of Duty: Warzone has influenced Activision Blizzard’s plans for announcing the next mainline Call of Duty game.
In a call with investors, Activision Blizzard’s executives fielded numerous questions about Call of Duty, which was the driving force behind a strong second quarter for the company.”
Source: N4G PC Activision: "Warzone caused us to rethink how, when and where we reveal our upcoming title"