Currently, there is not Iron Man game is development. I am saying this because, I closely follow the news of newly released and upcoming video games, especially super hero based video games. I think you misunderstood it with something else. Here are the possible things :
Disney Playmation : This is a wearable gaming gadget. This product will be based upon the popular franchises of Disney like Avengers, Star Wars, Frozen etc. According to The Verge, the first wearable will be based upon Iron Man's repulsors/armor.
Batman Arkham Knight : This is not a gadget, instead, it is a video game. It is the fourth and last installment in the critically and commercially successful "Batman Arkham" video game series. I think, due to some misunderstanding, you referred this game as Iron Man. Its release date is 06.23.15.