Relive the historic first meeting between Marvel''s Mightiest Heroes as Loki''s plot to gain ultimate power sparks a worldwide manhunt, a vicious battle against the invading Chitauri in the heart of New York City and the founding of the mighty Avengers! Next, thrill to an all new Infinite-style adventure in the Marvel Cinematic Universe! What world-shaking threats have the Avengers battled since their last film? And can anything prepare them for the looming peril of the mad mechanoid known as Ultron?