Iron Man is a superhero character appearing in American comic books published by Marvel Comics, and is a prominent figure in the Marvel Cinematic Universe. The character, alter ego Tony Stark, is a wealthy industrialist and ingenious engineer who builds a powered exoskeleton suit and becomes a superhero.
It's become Iron Man.
""The speaker mentions Robert Downey Jr. and states, 'And it's become Iron Man,' referring to the character and the popular film franchise he portrays."