Henderson revealed that the source of the rumor comes from @NEXTGEN_ishere Twitter user, who stated that the big revelation will happening on August 19, 2021 at 10:45 AM PDT. Several personalities have dismissed the claims, but all of a sudden, the post was removed via DMCA for some reason. Suspicious.
Henderson sought out for his own sources and four of them have verified that the rumor was indeed true. Unfortunately, these sources do not have information about what will be revealed during this upcoming event.
Again, take all of these reveals with a grain of salt for now. No official confirmation yet from Activision or a studio that would claim that they are developing this game.
Call of Duty Vanguard is rumored to be released sometime this year with campaign, multiplayer, and zombies mode.