And there came a day, unlike any other, when Earth's mightiest heroes found themselves powerless against a threat too formidable for them to comprehend. On that day, Thanos declared himself supreme ruler of the universe. 
Appearances
Featured Characters:
Supporting Characters:
Antagonists:
Other Characters:
- S.H.I.E.L.D. (Mentioned)
- Nick Fury (Illusion or holographic simulation)
- Hydra (Mentioned)
- A.I.M. (Mentioned)
- Squadron Supreme (Mentioned)
- Red Skull (Johann Shmidt) (Illusion or holographic simulation)
- Howard Stark (Mentioned)
Races and Species
Locations:
Items:
- Infinity Gauntlet
- Falcon Armor
- Mjolnir
- Hawkeye's Bow and Trick Arrows
- Black Widow's Gauntlets
- Captain America's Shield
Vehicles:
- Aven-Jet Prime (Destruction)
- Tricarrier (Illusion or holographic simulation)
- Milano
Synopsis
With the power and might of all five Infinity Stones finally in his gauntlet, Thanos plans to wield his power over the Universe while the Avengers make a desperate attempt to stop him.
Marvel's Avengers Assemble Season 2, Ep. 13 - Clip 1
Notes
- Adapted in Marvel Universe Avengers Assemble Season Two #12.
Trivia
- Ultron first appeared in the comics in Avengers #54 as The Crimson Cowl.