The very first teaser trailer for “Avengers: Age of Ultron” (in theaters May 1, 2015) just debuted online via Marvel, and man, the wait was worth it: James Spader’s voice as the robotic villain is chilling, the clash between Tony Stark’s Hulkbuster and The Hulk looks amazing, and that shot of Andy Serkis playing someone is, well, mysterious.

The film, directed by Joss Whedon, stars Robert Downey Jr. as Iron Man, Chris Evans as Captain America, Chris Hemsworth as Thor, Mark Ruffalo as The Hulk, Scarlett Johansson as Black Widow, Jeremy Renner as Hawkeye, Samuel L. Jackson as Nick Fury, Cobie Smulders as Agent Maria Hill, Elizabeth Olsen as Wanda Maximoff, Aaron Taylor-Johnson as Pietro Maximoff, and Paul Bettany becomes Vision.

Watch the official “Avengers: Age of Ultron” trailer in full HD and take a look at the poster below.

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“Marvel Studios presents Avengers: Age of Ultron, the epic follow-up to the biggest Super Hero movie of all time. When Tony Stark tries to jumpstart a dormant peacekeeping program, things go awry and Earth’s Mightiest Heroes, including Iron Man, Captain America, Thor, The Incredible Hulk, Black Widow and Hawkeye, are put to the ultimate test as the fate of the planet hangs in the balance. As the villainous Ultron emerges, it is up to The Avengers to stop him from enacting his terrible plans, and soon uneasy alliances and unexpected action pave the way for an epic and unique global adventure.”