A trailer for the movie "Avengers: Doomsday" has been released, featuring a number of characters from the Marvel Cinematic Universe. The trailer's content has sparked a range of reactions from fans, with some expressing upset that they cannot watch it. Reports about the movie's plot and characters are varied, with some outlets suggesting that Doctor Doom may not be the villain and that certain heroes may team up with him, while others speculate about the return of main MCU characters.