We have seen Tony Stark's Iron Man armor receive significant improvements in each movie, from the crude Mark I Tony built in the cave in Iron Man, all the way up to the Mark VII in Marvel's The Avengers. Today, we have an interesting piece of concept art from Iron Man 3 that shows us the "Heartbreaker" armor Robert Downey Jr. will be wearing. The suit's title may be an oxymoron, since the chest and heart area seem more protected than ever with this suit. Of course, we're not sure what new modifications this suit has just from the illustration, but speculate to your heart's content below.