Iron Man was released back in 2008 which launched the MCU as we know it.

Now "director's commentary" has surfaced featuring Jon Favreau and Robert Downey Jr. that actually can be played side-by-side the movie.

The audio was recorded on Saturday, September 6, 2008 at the Aero theater in an event by the "American Cinematheque."

Iron Man grossed $585,174,222 worldwide.

(via reddit)