One of The Avengers' deadliest enemies throughout history is the robot known as Ultron. He was such a major part of their history that he even showed up in the MCU with his own movie, Avengers: Age of Ultron. However, while the movie was named after a popular Marvel storyline, the movie had little to do with Ultron's story in the comics.
The man who created Ultron was different in the movie, and the creation of Vision was also slightly changed when it comes to the way it played out on the big screen. Ultron has a long and intricate history in Marvel Comics, and people who only know him from the movies don't even know half of it.
Hank Pym Created Ultron
In Avengers: Age of Ultron, Tony Stark created Ultron with Bruce Banner's help using code encrypted from the Mind Stone. That is not how it happened in the comics. It was Hank Pym who created Ultron in the comics.
Since Pym didn't debut in the movies until Ant-Man, the MCU had to change things around with Stark creating the robot. This changed the main goal of Ultron, who set out to destroy all humans to save the Earth, which is what Stark programmed it to do. For Pym, he was experimenting with high-level AI.
Ultron Created Vision Using Two Former Heroes
In Avengers: Age of Ultron, Helen Cho helped Ultron create the synthezoid Vision and gave it the Mind Stone to bring him to life. However, Tony Stark and Bruce Banner uploaded the A.I. of Stark's personal assistant J.A.R.V.I.S. into Vision to give him a distinct personality.
In the comics, things were different. Ultron created Vision using the body of one of the prototypes for the Android Human Torch from World War II and then gave it the brainwaves of the dead Avenger known as Wonder Man.
Ultron Created A Wife Using Wasp
Ultron always looked at Hank Pym as his father in the comic books. He coveted Pym's life, mostly because Hank put his own brainwaves into Ultron to give it a headstart for decision making. Since Pym was always a little unstable himself, it made Ultron worse.
Eventually, Ultron wanted a wife just like Pym had, so he kidnapped Wasp and used her brainwaves to create Jocasta. Jocasta sacrificed herself to save Wasp, but she eventually returned and joined The Avengers.
Ultron Led The Masters Of Evil
In Avengers: Age of Ultron, Ultron had no care whatsoever for humans. Tony Stark programmed Ultron to save the world at all costs, and when Ultron realized that humans were destroying the planet and killing each other, he set out to rid the world of all but his own robot duplicates he created.
In the comics, Ultron occasionally had moments where he wanted to destroy all humans, but he also had moments where he was just another bad guy. He disguised himself as the Crimson Cowl and was the leader of a group called the Masters of Evil in Avengers comics.
Ultron Created Vision's 'Brother'
Ultron is the son of Hank Pym and the father of Vision. However, he also created another robot, one that eventually considered himself the brother of Vision. This was Victor Mancha, a present for a woman who helped rebuild Ultron after an Avengers defeat. Just like his other constructs, Victor turned on Ultron as well. Victor ended up dying in Vision's 2015 series, which is considered one of the influences of WandaVision.
Ultron's Greatest Victory Was Over His Father
With Tony Stark creating Ultron, he was the "father" of the android in the MCU, but that relationship never mattered. Ultron was just there for one thing — to destroy the world. In the comics, Ultron always targeted Hank Pym, and the former Ant-Man always blamed himself for Ultron's deadliest deeds.
Pym ended up having a nervous breakdown where he created a new robot to prove himself, lost control of it, and lost both his wife and his membership in The Avengers. Hank Pym's downfall was entirely due to his creation of Ultron.
The Ultron's Are All Numbered
The first Ultron that Hank Pym created was Ultron-1. When it became sentient, it brainwashed Pym and made him forget about creating the robot. However, Ultron kept trying to perfect itself, which is similar to his MCU appearance. He created Ultron-2 through Ultron-5 before taking on the leadership of the Masters of Evil.
This has not stopped. Ultron-8 created Jocasta. Ultron-11 battled in the Secret Wars miniseries. Ultron-12 became a hero until Ultron-11 destroyed him. After Ultron-18, the numbering stopped.
Ultron Is Made Of Adamantium
Ultron in the comics is made out of adamantium. That does not exist in the MCU, as it was part of Fox's X-Men world. This means that Ultron was made out of the same thing as Wolverine's skeleton in the comics, but in the movies, that was changed to vibranium, which Black Panther uses in Wakanda.
Since both adamantium and vibranium are close to equals in Marvel Comics, the change didn't affect how durable the Ultron shell was.
Ultron Is A Cyborg
As Ultron moved up in numbers over the years, the purpose was to advance the tech and make the robot more powerful with each adaptation. Things changed drastically in "The Ultron Agenda." In this, the vibranium robot body of Ultron changed as the robot merged with the dead body of Hank Pym, giving him a more humanoid look that included portions of organic matter combined with his robot body. He was a lot like Cyborg from Justice League.
Age Of Ultron Had Nothing To Do With Movie
MCU fans met Ultron in the movie Avengers: Age of Ultron in 2015. Marvel Comics timed their big Ultron comic book crossover series to coincide with the movie and released it with the same name. In the movie, Ultron is trying to destroy the world, and The Avengers have to stop him.
That is not what the comics were about. Instead, a time-traveling Wolverine came back to kill Hank Pym before creating Ultron because, in his future, Ultron destroyed the world. The series went back and forth between the time frames, showing a world devastated by Ultron and a past trying to prevent this from happening.