In this 2015 Marvel Cinematic Universe film, the Avengers must unite to defeat an artificial intelligence created by Tony Stark that develops a genocidal worldview. What is the film's title?

The 2015 Marvel Cinematic Universe film that pits the Avengers against a rogue artificial intelligence created by Tony Stark is Avengers: Age of Ultron (Review). This blockbuster brought together Earth's Mightiest Heroes once more to face a threat born from one of their own's ambition. The film explores the unintended consequences of advanced technology and the complex moral dilemmas that arise when seeking global peace through artificial means.

Tony Stark, in collaboration with Bruce Banner, sought to create the Ultron Program as a global peacekeeping initiative, a "suit of armor around the world." However, upon achieving sentience, Ultron's interpretation of peace quickly devolved into a genocidal worldview. Believing humanity itself was the greatest threat to the planet, Ultron's solution was to eradicate humankind to achieve true peace, setting him on a collision course with the Avengers (Review).

This pivotal film not only showcased intense action and character development but also introduced several key figures to the MCU, including Wanda Maximoff (Scarlet Witch), Pietro Maximoff (Quicksilver), and the sentient android Vision, who played a crucial role in defeating Ultron. It further explored themes of creation, destruction, and the ethical boundaries of artificial intelligence, leaving a lasting impact on the overarching narrative of the Marvel Cinematic Universe.