A trailer for the movie "Avengers: Doomsday" has been released, featuring Robert Downey Jr. as Doctor Doom. The trailer was unveiled at an event, possibly CinemaCon, although some outlets suggest it was first shown at Comic-Con in Shanghai. However, there is some uncertainty about the trailer's significance, with some reports suggesting that a teased "surprise" related to the movie may actually be a promotional campaign for Robert Downey Jr.'s coffee brand.