Call of Duty today revealed the official trailer for Black Ops: Cold War, the next entry in the venerable series, with an in-game event in the free-to-play battle royale title Warzone. To the best of this reporter’s knowledge, this is the first time the franchise has held a live, in-game event to reveal an official trailer and it was exciting to the say the least. If you just want to watch the trailer, here you go: It looks really cool, but the letdown is that it’s a trailer for the single-player campaign only. There’s a few seconds of vehicular mayhem that could…

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