Earlier today, we showed you seven new photos from Marvel's highly-anticipated Phase Two sequel Avengers: Age of Ultron, along with our first look at the villainous Ultron on the cover of Entertainment Weekly. Now we have new details about how Ultron was created and why he becomes the biggest threat this group of superheroes have ever faced.

In the Marvel comic books, Ultron was created by Hank Pym, a.k.a. the original Ant-Man, but the villain's origin is being altered for this Marvel Phase Two sequel. Tony Stark (Robert Downey Jr.) is the one who creates Ultron, a sentient robot described as being, "all-consuming in his quest for knowledge" who is also programmed to feel emotions. He was designed to give Tony a break from his Iron Man duties, leading a "planetary police force" known as the Iron Legion, which is made up of other robots who resemble the Iron Patriot armor but do not have an emotional core like Ultron does. Ultron can also take on different forms each time he is defeated.

However, as Chris Hemsworth explains, Tony Stark's first mistake was uploading Ultron with elements of his own personality, although not the aspects he would have hoped for, with Ultron taking on his cynical nature instead of his intuitiveness.

"It's not the good version that could've come from [Stark's] intellect and personality. It's the bad son."

We also get new details about the big party Tony Stark throws at the beginning of this sequel, which we first reported on last month. Tony sees the party as a chance to mingle with New York's elite, showing powerful residents that there is much more to his superhero team than the costumes they wear. The party is winding down, with just Thor (Chris Hemsworth), Black Widow (Scarlett Johansson), Bruce Banner (Mark Ruffalo), Hawkeye (Jeremy Renner), Captain America (Chris Evans) and Maria Hill (Cobie Smulders), all in civilian clothes, when Ultron and his Legionnaire drones attack Avengers tower, announcing his plan to bring peace to the planet, by destroying the most destructive force on Earth, all humans.

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Although he is completely unarmed, Tony Stark grabs a fondue fork and stabs it in Ultron's neck as they "bang around the ceiling." Director Joss Whedon made the following joke about Tony's weapon of choice.

"The deadliest fondue fork in all the land! From Odin's melted cheese, I shall destroy thee!"

While the Avengers make short work of the Legionnaires, Ultron delivers this line to the superheroes.

"I know you're 'good' people. I know you mean well... but you just didn't think it through... There is only one path to peace... your extermination."

Director Joss Whedon delivered the "patronizing snarl" of Ultron himself during shots where the heroes are seen reacting to Ultron's speech, but a few days earlier, James Spader was on set delivering those lines.

Here's what Chris Evans had to say about the intelligence that Ultron possesses.

"A lot of times when Ultron starts talking, it's beautiful. It's really intelligent stuff. He's out to do the things he wants to do because he's disgusted with X, Y, and Z. You could probably sit down with Ultron and have a really intelligent conversation. He could blow your mind with his views. Yeah, and then kill you."

Are you more excited for Avengers: Age of Ultron now? Stay tuned for more details regarding this highly-anticipated Marvel Phase Two sequel when Marvel Studios hits Comic-Con 2014 next week.