It's twice the action and twice the danger as Earth's Mightiest Heroes return for another season of smashing evil! - When the Red Skull seeks refuge from an even greater villain, the Avengers must face their most dangerous foe yet: Thanos of Titan! - Can the Avengers keep Thanos from gaining the Power Stone? - Hulk crash-lands on Earth with no memory except one: the planet is doomed! Can the Avengers help the Green Goliath remember the danger before it's too late? - The Red Skull has information that could save Earth, but he's been kidnapped! To rescue his worst enemy, Captain America must face his oldest friend: Bucky Barnes, the Winter Soldier! It's explosive action from your favorite heroes, based on the hit animated series now airing on Disney XD! Collecting MARVEL UNIVERSE AVENGERS ASSEMBLE SEASON TWO #1-4.