A player from Call of Duty Warzone recently unlocked a door in a mysterious farmhouse and found some hints on what the next Black Ops game will be about.
Twitter user @PrestigeIsKey recently found a code from an item in the game, which unlocked a certain door in the mystery farmhouse located in zone H6. When he entered the room, he found TVs, a phone, a generator, blueprints, and a few item drops to reward the players for their discovery.
A poster was also found inside and had the word Venona. This was a code-cracking poster and for those who know their history, the Venona project was a program run by the US government from 1943 until 1980. This was counterintelligence and its main goal was to decode messages being sent to and from the Soviet Union. This happened during the Cold War.
This is a big hint that confirms the next title of Black Ops will be focusing on the Cold War. No official confirmation from Activision, so we will never know.
Thanks DualShockers for the history info!