Another Neat Plot Point For Age Of Ultron

Ultron's creator will be...Tony Stark! In the comics, the creator of Ultron is Henry Pym aka Ant Man aka Giant Man aka Yellow Jacket aka...so many superhero identities. Just pick one.

Since this character has not been introduced in the Marvel Cinematic Universe yet and since movie-Stark is the tech guy, this is a good idea. Having Tony develop the AI to help the Avengers cope with threats in the post-SHIELD world makes sense. We'll have to see why Ultron goes all genocidal. Maybe he's like Bender and it's just part of his charming personality.