Galactus (Earth's Mightiest Heroes)

Galactus is a powerful and immortal cosmic being who is known as the Devourer of Worlds because of his huge appetite for worlds around the universe. He has heralds to proclaim his arrival on each targeted world he chooses to consume. He is the overall arch-nemesis of the Avengers, the Fantastic Four, Code White, the New Avengers and the Skrulls.

He serves as an unseen antagonist in Season 1 and the overarching antagonist of Season 2.