From Entertainment Weekly. Thoughts?
And it turns out the speculation about Tony Stark making Ultron is true:
With S.H.I.E.L.D. no longer serving as Earth?s defense and first response against the unknown and other-worldly, it?s up to The Avengers. And to help them out and given them a break, Stark develops Ultron, a sentient program, an artificial intelligence that will help him to serve as an Avenger without actually suiting up himself ? building off of what we saw in Iron Man 3 where we met an Iron Legion of automated suits in the final act.
This self-aware AI ? perhaps an evolution of JARVIS from the Iron Man films and The Avengers 1 - can locate threats and control Stark?s legion of drone suits to deal with them? until Ultron decides that humans are the greatest threat. Joss Whedon, while smiling and rubbing his hands together:
?Ultron sees the big picture and he goes, ?Okay, we need radical change, which will be violent and appalling, in order to make everything better?; he?s not just going ?Muhaha, soon I?ll rule!? He?s on a mission. He wants to save us.?