Godzilla (2010 Marvel Animated Universe)

Godzilla is a giant monster from Japan and an enemy of the Avengers. He appears in  Marvel's Godzilla: King of the Monsters.

Biography
Godzilla was a dinosaur that survived the extinction and gets mutated by nuclear radiation.

War against humanity
Godzilla made his first contact with the human race since he first attack on Tokyo since 1954.

Trivia

 * This Godzilla does not get killed by the Oxygen Destroyer.