When the other Hulks try to leave A-Bomb out, he starts to doubt his strength as an agent of S.M.A.S.H., and realizes that he must use his other attributes to help the team when the Hulks are challenged by Xemnu the Titan, an intergalactic fighting champion. Find out if the Agents of S.M.A.S.H. can defeat Xemnu and prevent him from destroying the Earth.
While looking for a way back to Earth, the Hulks discover the Leader stowed away on board the ship. Retribution must wait as the Agents of S.M.A.S.H. have to fight Ronan the Accuser and his Kree soldiers to save an old foe: Ego the Living Planet. But when Galactus comes to consume Ego the Living Planet, the Agents of S.M.A.S.H. must put themselves at risk to save the lives of their two enemies.