Watch Iron Man & Captain America: Heroes United (2014) : Full Movie Online Free Iron Man and Captain America battle to keep the Red Skull and his triggerman, Taskmaster, from unleashing an army of Hydra Brutes on the world! Sequel to the film "Iron Man & Hulk: Heroes United" and feature Iron Man teaming up with Captain America, it comes to accompany the live-action film "Captain America: The Winter Soldier".