"RDJ's Alternate Marvel Role: From Doom to Iron Man" 

"RDJ's Marvel Role Shuffle"

Robert Downey Jr. was initially in talks to play a different Marvel character.

"RDJ's Iconic Iron Man"

He gained global recognition as Tony Stark/Iron Man in the Marvel Cinematic Universe.

"RDJ's Marvel Character Swap"

Director Jon Favreau revealed that Downey Jr. was interested in playing another character.

"RDJ Almost Doctor Doom"

Downey Jr. was considered for the role of Doctor Doom in the Fantastic Four film.

"Julian McMahon: Victor Von Doom"

Julian McMahon ultimately played the role of Victor Von Doom in the 2005 film.

Favreau's Perfect Puzzle: Downey Jr.

Favreau saw Downey Jr. as the perfect fit for Iron Man, calling him the puzzle piece.

"Downey Jr.'s Intuitive Casting"

Downey Jr. understood the voice of the character and made the casting process easier.