The past history of Iron Man of Earth-7812 mirrors that of his Earth-616 counterpart up until the formation of the Avengers. In this reality, Rick Jones would become the Hulk and be manipulated by Loki. Iron Man would be one of the many heroes who would be gathered to battle the Hulk, the group would discover Loki's trickery and defeat him. After the battle, Iron Man and the others would band together to form the Avengers.
On their second mission against the Space Phantom, the invader would sow descent between the Avengers and the Hulk. Finding the Hulk a menace, Iron Man would attempt to contain him until Bruce Banner would blast the brute with a gamma ray device that would temporarily cure Rick.
Iron Man's subsequent activities likely mirrored his Earth-616 counterpart, and he would upgrade his armor. He would be involved in Earth-7812's version of the Kree/Skrull War, however his involvement and his subsequent activities remain unrevealed.
Powers and Abilities
Tony Stark has no powers of his own but they are derived from his Iron Man Armor.