Why did Tom Cruise reject the role of Iron Man Revealed!

Today, the MCU isn't just a successful franchise — it's a highly-influential one. Almost every A-list star from Keanu Reeves to Henry Cavill is interested in joining the MCU's collection of superheroes and villains. So Marvel has no shortage of big names available for their movies and TV shows. But before the MCU became a major success, Tom Cruise couldn't see the spark that would turn it into the most successful film franchise of all time.
The "Mission Impossible" actor revealed in 2018 that he had been involved in discussions to play Iron Man, but from the beginning, it didn't feel like the right choice for him.
Cruise Said :- "[Marvel Studios] came to me at a certain point and, when I do something, I wanna do it right. If I commit to something, it has to be done in a way that I know it's gonna be something special. And as it was lining up, it just didn't feel to me like it was gonna work. I need to be able to make decisions and make the film as great as it can be, and it just didn't go down that road that way." 
Tom Cruise also praised Robert Downey Jr., sharing that he was great for the role and couldn't picture anyone else playing the character.