When you think of the Marvel Cinematic Universe, the first name that comes to mind has to be Robert Downey Jr. The actor has been a mainstay for the MCU for more than a decade, appearing in the franchise's first ever film, Iron Man.

Downey has appeared in nearly half of MCU movies, but many signs point to Avengers: Endgame being his last appearance. Endgame will culminate the 11-year-long storyline that has been spread out in the 21 previous films.

Tony Stark will obviously be a key character in the film, as he makes his way from space back to earth to lead the Avengers in battle against Thanos. And although Endgame is over three hours in length, Downey just revealed that a sequence lasting less than 10 minutes will be what every fan talks about after leaving theaters.

"The last eight minutes of [Avengers: Endgame] are maybe the best eight minutes in the entire history of the whole run of them, in a way, because everyone’s involved," Downey, who was the lone actor to receive the film's full script, told The Upcoming.

Taking his comments at face value, it sounds like Downey is hinting at every hero looking to avenge the fallen will play a part in Thanos' defeat at the end of the film. Or Downey means it's just the Avengers' "Big Three"--Iron Man, Thor and Captain America--who will close out the movie's final minutes.

Whatever that ending may be, the veteran actor is pretty confident fans won't be able to predict it beforehand. "I guarantee you there is no way anybody could guess what's going to happen," Downey said in an interview earlier this month.

Downey's comments adds further fuel to the hype for Avengers: Endgame, which will be theatrically released April 26.