With Nebula threatening the entire universe, Captain America, the Wasp, and General Zedrao plan the assault on Thanos' former starship! Earth's Mightiest Heroes have not visited Sanctuary II, since the classic Avengers Annual 7, but now alongside the sinister Skrulls, the six avengers attack! Nebula has the awesome weaponry of Sanctuary II at her disposal, but the Skrull armada, Hercules, Captain Marvel, and Firelord are charging hard! Who will win the savage outer space shootout? And could unexpected help be coming somewhere from beyond? Story continues in Avengers Annual 14.