“What If… Ultron Won?” is the eighth episode of the American animated television series What If…?, based on the Marvel Comics series of the same name. It explores what would happen if the events of the Marvel Cinematic Universe (MCU) film Avengers: Age of Ultron (2015) occurred differently, with Ultron using the Infinity Stones to kill virtually all life in the universe after successfully transferring his consciousness into Vision’s body. It also serves to set up the first season’s finale, as Ultron finds a way to traverse to other universes (established in the previous episodes), threatening the balance of the multiverse. The episode was written by story editor Matthew Chauncey and directed by Bryan Andrews.
What If… Ultron Won? – Trailer
Ultron, having taken the Mind Stone and Vision’s vibranium body, has defeated the Avengers and launched a global nuclear holocaust, killing most of humanity. When Thanos appears on Earth to complete the Infinity Gauntlet, Ultron bisects him and takes the rest of the Infinity Stones, using them to create a massive drone army with which he wipes out almost all life in his universe. Ultron then hears the Watcher, discovering the existence of the multiverse, and attacks the Watcher in his multiversal observatory. Meanwhile, Clint Barton and Natasha Romanoff survive Ultron’s attacks and find a copy of Arnim Zola’s mind in Siberia. They upload Zola into a drone body to try to destroy Ultron’s hive mind, but it fails because Ultron has left their universe. Barton sacrifices himself to allow Romanoff and Zola to escape from the Ultron drones. Ultron battles the Watcher across different universes and defeats him. The Watcher flees to Strange Supreme’s collapsed universe to ask him for help while Ultron plans to conquer the multiverse.
Jeremy Renner as Clint Barton / Hawkeye, Lake Bell as Natasha Romanoff / Black Widow, Toby Jones as Arnim Zola, Ross Marquand as Ultron and the Sub-Ultron Sentries, Josh Keaton as Steve Rogers / Captain America, Mick Wingert as Tony Stark / Iron Man, Alexandra Daniels as Carol Danvers / Captain Marvel, and Benedict Cumberbatch as Doctor Strange Supreme