Nobody can question the success the Marvel Cinematic Universe's Iron Man movies have achieved, especially since Iron Man 3 managed to make $1.2 billion dollars at the global box office. It would be safe to presume that the studio will continue banking on its success without changing a single thing involved; however, it sadly isn't the case.
The actor who plays Iron Man, also known as Tony Stark is already turning 50 this 2015. Robert Downey Jr. might have already been confirmed to appear in Captain America: Civil War, but after that, nothing's guaranteed.
Marvel Cinematic Universe has planned things out all the way until 2019, with no Iron Man 4 talks yet, and by then, Downey would already be 54 years old. That only means that the earliest anyone can see Iron Man 4 is in 2020, but by then the beloved actor would already be pushing 55.
The role of Iron Man isn't as physically taxing compared to some of the other superheroes, but it is still exhausting nonetheless.
The only solution for Marvel Cinematic Universe, if they intend on keeping Downey on board, would be to write a storyline with a much older Tony Stark. Or they could just pass the roe down to someone much younger, like they did with Spider-Man (not to say that Andrew Garfield is old! But old in high school student terms).
Venture Capitalist Post believes that if the Marvel Cinematic Universe pushes through with the recasting of the role, they would do it right after Avengers: Infinity War, meaning it would be the last movie where people can see Downey play the arrogant genius tycoon Tony Stark.
At the same time, Avengers: Infinity War would be playing around with a time or reality manipulation because of the villain Thanos and his Infinity Gauntlet, and this would open the doors with the introduction of a much younger Stark.
The website Movie Pilot has already ruled out a list of characters who won't be making an appearance on the film. The first is any members of the Fantastic Four as well as the X-Men, even though Reed Richards and Wolverine played key roles in the Infinity War plot.
And since Doctor Doom belongs to Fox, the villain won't be appearing as well.
Avengers: Infinity War Part 1 will premiere on May 4, 2018 while Avengers: Infinity War Part 2 has been scheduled on May 3, 2019.
