The first official trailer for the “The Avengers: Age of Ultron” movie was released by Marvel Entertainment nearly a week ahead of schedule, after a grainy preview was leaked online. The trailer was reportedly scheduled to preview during the “Agents of S.H.I.E.L.D” television series on Oct. 28.

The new trailer shows the superheroes from Marvel’s 2012 film, “The Avengers.” The two-minute clip also shows the super villain Ultron, voiced by James Spader. Robert Downey Jr., Chris Evans, Mark Ruffalo, Chris Hemsworth, Scarlett Johansson, Jeremy Renner and Samuel L. Jackson all reprise their roles from the original blockbuster, alongside new cast members including Aaron Taylor-Johnson and Elizabeth Olsen, who play the roles of Quicksilver and Scarlet Witch respectively.

Marvel also posted a new poster for the film on Twitter, written and directed by Joss Whedon and produced by Kevin Feige.

Walt Disney Pictures and Marvel Studios recently released the official synopsis of the film.

"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," the studio said. "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."

Ultron was reportedly described as "a terrifying technological villain hell-bent on human extinction."

The movie is scheduled to hit theaters on May 1, 2015.

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