Disney XD has released a clip from this coming Sunday's episode of the animated series Marvel'sAvengers Assemble, which sees Earth's Mightiest Heroes confronted by the ruler of Latveria, Victor Von Doom...
Entitled 'The Serpent of Doom', the fourth episode in the new series sees Thor believing he must sacrifice himself to save the world from Doctor Doom, who summons the Midgard Serpent using a powerful Asgardian weapon.
Avengers Assemble airs on Disney XD's Marvel Universe programming block on Sundays at 11am ET.