“Captain America” Lets Avengers: Doomsday Spoiler Slip — Anthony Mackie Reveals Vision Is Joining the Fight Against Doctor Doom

(Image courtesy of Marvel Studios)

With just over a month to go before "Avengers: Doomsday" storms into theaters, fans are still wondering which other stars could join its already massive ensemble. The latest surprise appears to be Paul Bettany, who plays Vision, after current Captain America Anthony Mackie seemingly let the news slip during a recent interview with "Entertainment Tonight." Watch the interview below:

Mackie made the apparent slip while promoting his new Apple TV heist series, "12 12 12", which premieres Friday, November 13. "Avengers: Doomsday" opens in U.S. theaters December 18.