The Earth's Mightiest Heroes are trapped, helpless prisoners of Kang the Unconquerable! Who can save the Avengers? Would you believe Nick Fury and his Howling U.S. Marines?! Plus: just what is the plan of Loki and the Enchantress? Double plus: Mantis and Hank Pym! What more do you want? Ultron? O.K., we've got him too!