Rumors surrounding the upcoming Avengers: Doomsday film are causing uncertainty among fans, with some suggesting that Captain America's team may not be what is expected. There are also rumors of a potential traitor among the Avengers and possible appearances by characters such as Doctor Doom and the X-Men. The details of the film, including its direction and plot, remain unclear, with some outlets speculating about the return of Captain America and the potential to address past mistakes in the franchise.