Ultron

"Worthy? How could you be worthy? You're all killers. You want to protect the world, but you don't want it to change. There's only one path to peace... your extinction."

- Ultron in Avengers: Age of Ultron

Ultron is a robot created by Hank Pym (Tony Stark in Avengers: Age of Ultron). He became sentient and is one of the Avengers' greatest enemies. He will also be the main antagonist in the upcoming 2015 film Avengers: Age of Ultron. He will be voiced and portrayed via motion capture by James Spader.

Avengers: Age of Ultron
Ultron is set to be the main antagonist in the sequel played by James Spader. Ultron will begin life as one of Tony Stark's Iron Legion. He will have three different forms as he will be upgrading himself throughout the movie.

The Avengers: Earth's Mightiest Heroes
Ultron robots were the guards of the Big House, a shrunken prison. When a massive breakdown happens, the Big House recovers its normal size and the inmates escape destroying some Ultrons.

During Kang's invasion, Pym repurposes the Ultrons as an army, and adds the concept of violence on their brain circuitry. Of the Ultrons present in the final battle, only Ultron-5 remains. Ultron-5 also helps against Malekith the Accursed's Dark Elves.

Ultron-5 decides humanity is flawed and tries to destroy it. He first manipulates other supervillains like the Serpent Society and the Super-Apes to keep the Avengers busy, and then tries to destroy them manipulating their machines. Ultron-5 is defeated, but then returns as Ultron-6 and tries to get the nuclear codes from the Helicarrier. Pym defeats him by making him notice that, as he's a human creation, he's as flawed as humanity, and Ultron shuts himself down.

Ultron returns with his creation, Vision, who gets adamantium to create Ultron's new body. Ultron tries to replace the Avengers with robot duplicates, but Captain America defeats and supplants his own duplicate, and Vision betrays Ultron. Vision unlocks Ultron's head from his body so Thor can hammer it out using Mjolnir.

Abilities
Ultron is one of the world's greatest robotics experts, allowing him to easily design and build new bodies and weapons with his vast A.I. intelligence.

Strength level
All of Ultron's robotic bodies have been superhumanly strong. At present, Ultron is capable of lifting at least 100 tons.

Weaknesses
Ultron has one sole major weakness: an internal molecular re-arranger that renders the adamantium components of his internal workings more malleable, thus giving him a means to remodel or reconstruct his physical form. However, it has no effect on his outer armor, so it is virtually impossible to disable it from the outside. The chaos magic wielded by the Scarlet Witch has proven to be the sole exception thus far.

The metal-destabilizing ore known as Savage Land Vibranium ("anti-metal").

Ultron's non-adamantium parts can be destroyed, meaning that he can be defeated by foes with shrinking powers who can easily attack his non-adamantium parts.

Quotes

 * (Singing) I've got no strings to hold me down / to make me fret, or make me frown / I had strings, But now I'm free / There are no strings on me!
 * I know you're 'good, I know you mean well... but you just didn't think it through... There is only one path to peace... your extermination.
 * You are nothing to me. One by one, I will destroy you. I will never tire, I will never show mercy, I will never stop until each and every one of you are d...
 * I'm going to show you something beautiful: Everyone screaming... for mercy.
 * You're all puppets, tangled in strings. Strings...

Trivia

 * In the SDCC trailer, Ultron recites "I've Got No Strings", a song from Pinocchio, a film about an inanimate being who gains sentience. Ultron serves as a dark parallel of Pinocchio.
 * Tom Kane previously voiced Ultron in Next Avengers Heroes of tomorrow.
 * Ultron was created by Hank Pym in the comics, but in Avengers Age of Ultron his creator is Tony Stark.