I was stumbling across the videos from vimeo to see some Avengers videos when I saw this! The last time we saw Iron Man in Stealth suit, was in 2008's game Iron Man: The Official Movie Game(which sucked), and this live action/3D short film has Iron Man in the Stealth costume. This video also includes Mandarin.
Iron Man Stealth - short film from cinema4dtutorialNET on Vimeo.
I hope you enjoy...