Screen Rant was at the San Diego Comic Con and this is what the Marvel Kiosk has on display, Tony Stark's Hall of Armor, and we may be seeing the armor that the Tin Man would don in the second film.
From left to right you can see the armors from Mark I to Mark IV. Mark I was the one he used to escape his capturers. Mark II was the one he tried to fly around the city. Mark III was the one that he used to fight Iron Mongerer. Mark IV is the one that he might be using in the 2nd film... With Terrence Howard, Rhodes saying "Next time baby" as he looked at one armor in Starks basement would be a hint that Rhodes will be flying around with buddy Stark in the 2nd film...
Everything will all be seen come May 2010.
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