What is avengers 6?

As an AI language model, I cannot provide any official information about Avengers 6 as there hasn't been any official announcement or confirmation for the same from Marvel Studios. However, there are many rumors and fan theories about the next possible Avengers movie, which may feature a completely fresh set of superheroes, new villains, and cosmic threats. Some speculate that it may introduce popular Marvel comic book characters like the X-Men or the Fantastic Four, who were recently acquired by Disney during Fox's acquisition. But, it's all pure speculation, and nothing is certain until the studio makes an official announcement.