Fan Casting

The film follows Tony Stark, Hank Pym, and Janet van Dyne as they develop the Ultron defense network. Their work is violently interrupted when Simon Williams (Wonder-Man) arrives seeking revenge against Hank after the events of The Astonishing Ant-Man. Despite a unified front, the three Avengers are overwhelmed by Wonder-Man's immense ionic abilities. At the climax, Simon prepares to deliver a lethal blow to Hank but cannot bring himself to commit murder. Disgusted, he flies away to retreat to his secret creator: the self-aware Ultron.Viewing humanity as flawed, Ultron ridicules Simon for his weakness, blasting him aside to initiate his own plan for global domination. Back at the lab, the inactive Ultron bots suddenly activate, their glowing blue interfaces shifting to an ominous red as they attack their creators. As Iron Man and Wasp fend off the ambush, Hank accesses the core system. He discovers a virus-laden origin code overriding every existing Ultron unit worldwide with a singular directive: eradicate humanity so machines can claim the Earth.Tracked by the signal, Ant-Man, Iron Man, and Wasp launch an assault on an A.I.M. facility harboring the prime Ultron. They are quickly overwhelmed by his vast army and upgraded Vibranium chassis. Just as Ultron prepares to execute Janet, Simon intervenes, smashing the tyrant in half. Holding the decapitated head, Simon hears Ultron's final, mocking words: "You are a failure." Ultron triggers an internal contingency, activating a built-in kill switch that drops Simon lifelessly to the floor. A drone swiftly retreats with Simon's corpse into the shadows. The movie ends in despair as Hank realizes his failsafes are overridden, leaving hundreds of thousands of rogue bots active. In a grim post-credits scene, Ultron uses Simon's corpse as the final piece to construct the Vision.