((Post Iron Man 3/Thor 2)) Loki returns for revenge but ends up unleashing prehistoric forces on an unsuspecting world. With the combined fury of Loki's army and the MUTOs, the Avengers find themselves overwhelmed and on the losing end. To turn the tables, Earth's mightiest heroes must seek the mightiest hero of them all to help save the Earth. Part 1 of 4.

The final thoughts of Dr. Serizawa as he ends Godzilla's life and his own.