It's all hands on deck with the Avengers, Champions, Guardians, X-Men and the Inhumans as they clash with monstrous hazards that threaten to destroy every corner of the Marvel Universe. Who are the Leviathons? Who controls them? How can they be stopped before Earth becomes another tragic barren world in their wake?

It's all hands on deck with the Avengers, Champions, Guardians, X-Men and the Inhumans as they clash with monstrous hazards that threaten to destroy every corner of the Marvel Universe. Who are the Leviathons? Who controls them? How can they be stopped before Earth becomes another tragic barren world in their wake?