There are two HUDs in the film, one for Iron Man’s Mark VI suit, which drew on original designs from Iron Man 2. The second HUD was created for the Mark VII version of the suit. “He’s got a lot of new bells and whistles incorporated into the new suit,” notes Hansen. “It was kind of an open book but the new HUD had to live and feel like the previous ones, although it was more sophisticated and a bit more organic.”

(via VFX roll call for The Avengers (updated) | fxguide)