Big Bad Toy Store has a pre-order up for a set of 8 Iron Man 3 Minimates that will be coming from Diamond Select Toys. No photo has yet been released. Look for them to be released in June 2013. We will update as more info becomes available.
UPDATE with slight correction courtesy of the folks at DST:
A Diamond Select Release! Designed and Sculpted by Art Asylum! The third Iron Man movie is almost upon us, and the trailers are promising plenty of action and drama. Well, Diamond Select Toys is promising Minimates! The newest assortment of movie-based Minimates will include Iron Man with the Mandarin, Iron Patriot with a top secret character to be revealed and two specialty-exclusive sets, War Machine and Maya Hansen and Aldrich Killian with Cowboy Tony Stark. Each Minimate stands 2 inches tall with 14 points of articulation and a variety of removable and interchangeable parts and accessories.
You can pre-order the Iron Man 3 Minimates At BBTS.