
The crossover story Age of Ultron 2013 includes a post-apocalyptic future in which Ultron took over the world and destroyed most of the world’s superheroes. He liked the robot’s malicious looking smile showing this to Buscema. Thomas said that the idea for the character and his appearance is largely based on Makino, a little-known robot villain who appeared in the Captain Video comic book. Thomas, who admitted it was difficult for him to name the characters, said he liked the -tron suffix and went from there. Ultron was created by writer Roy Thomas and artist John Buscema. Ultron originally appeared as an unnamed character in Avengers #54 (1968), and his first full appearance in Avengers #55 (1968).
