Iron Man 1 director Jon Favreau recently taped a show with Jimmy Kimmel in which he revealed an alternate post-credits scene that never made it to the movie.

Nick Fury, played by Samuel L. Jackson, appears in it and says his catchphrase, which caused the audience to applaud.
“Who the hell are you? Nick Fury motherfucker!” says an alternate post-credits scene that never made it to Iron Man’s final cut.
Recall that the first part of “Iron Man” was released in 2008 and became the first movie in the Marvel Cinematic Universe. This was followed by pictures telling about other superheroes.
Tony Stark was played by Robert Downey Jr., who officially left the role after Avengers: Endgame. By the way, artificial intelligence previously showed what Iron Man would look like if Arnold Schwarzenegger played him. Modders have already undressed the twin ballerinas from Atomic Heart
Source: VG Times