Heroes collide in the sweeping debut trailer for Marvel Studios' Avengers: Infinity War, which premiered online Wednesday (November 29).

The teaser, which features an assortment of Marvel's superheroes teaming up against a major galactic threat, connects a number of story lines established across the Marvel cinematic universe since Iron Man hit theaters nearly a decade ago in May 2008.

Captain America, the Winter Soldier, Black Panther, Iron Man, Spider-Man, Doctor Strange, Loki, Scarlet Witch, Hulk, Black Widow (now with blond hair!), Vision, Falcon, Ant-Man and more appear in the action-packed clip, which also sees a post-Ragnarok Thor meeting the Guardians of the Galaxy (Star-Lord, Drax, Rocket, Groot, Gamora and Mantis) for the first time.

Supervillain Thanos also makes his first non-space throne appearance as he lands in New York City, gauntlet literally on-hand as he seeks out the remaining Infinity Stones in his quest for ultimate power.

Watch the trailer up top. Like Hulk, Avengers: Infinity War smashes into theaters on May 4, 2018.

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