Shown earlier this summer at San Diego Comic-Con 2013, the teaser trailer for the follow-up to 2012′s The Avengers has hit the web.

The Avengers: Age of Ultron, is once again written and directed by Joss Whedon and reunites the likes of Robert Downey, Jr.’s Tony Stark/Iron Man with Chris Evans’ Captain America, Mark Ruffalo’s Bruce Banner/Hulk, Chris Hemsworth’s Thor, Scarlett Johansson’s Black Widow, and Jeremy Renner’s Hawkeye. Samuel L. Jackson also makes his return as Nick Fury.

This time around, the film’s villain is Ultron; an artificial intelligence (played by James Spader) and narcissistic robot with nothing but hate for his human creators. According to developers, the movie is supposed to be an original and not an adaption of the popular 10 book mini series from last spring. Avengers: Age of Ultron is due to hit theaters in the summer of 2015. Check out the teaser below.