AVENGERS: AGE OF ULTRON is an upcoming superhero film scripted and directed by Joss Whedon and features an ensemble cast that includes Robert Downey, Jr., Chris Evans, Chris Hemsworth, Mark Ruffalo, Scarlett Johansson, Jeremy Renner, Samuel L. Jackson, Cobie Smulders, James Spader, Elizabeth Olsen, Aaron Taylor-Johnson, and Paul Bettany. It is the sequel to 2012’s Marvel's The Avengers and the eleventh installment in the Marvel Cinematic Universe (MCU). In the film, the Avengers must work together to defeat Ultron, a technological enemy bent on human extinction.
With S.H.I.E.L.D. destroyed and the Avengers needing a hiatus from stopping threats, Tony Stark attempts to jumpstart a dormant peacekeeping program with Ultron, a self-aware, self-teaching, artificial intelligence. However, his plan backfires when Ultron decides that humans are the main enemy and sets out to eradicate them from Earth, and it is up to Iron Man, Captain America, Thor, the Hulk, Black Widow and Hawkeye, along with support from Nick Fury and Maria Hill, to stop him from enacting his plans. Along the way, the Avengers encounter the powerful twins, Pietro and Wanda Maximoff, as well as the familiar Vision.
- via Marvel