Before Iron Man, Robert Downey Jr. Almost Played A Major Marvel Villain

Many actors have contributed to the Marvel Cinematic Universe throughout the years,  

but Robert Downey Jr. was arguably the "face" of the well-known superhero franchise for a considerable amount of time. 

One of the main reasons Iron Man was so warmly received was Downey's portrayal of Tony Stark, 

and Marvel Studios president Kevin Feige even referred to this choice of actor as ,

"one of the most significant decisions in the history of Hollywood." 

But if things had turned out differently, Downey might have played a significant Marvel villain rather than Doctor Doom, 

one of the franchise's biggest heroes.When Kevin Feige and director Jon Favreau gathered...

...to talk about Iron Man for a Marvel video commemorating the film's 15th anniversary, 

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