“As a character I love [Ultron] because he’s so pissed off,” Whedon says. “…I knew right away what I wanted to do with him. He’s always trying to destroy the Avengers, goddamn it. He’s got a bee in his bonnet. He’s not a happy guy, which means he’s an interesting guy. He’s got pain. And the way that manifests is not going to be standard robot stuff. So we’ll take away some of those powers because, at some point, everybody becomes magic, and I already have someone who’s a witch.”
Whedon’s comments also seem to confirm that the Scarlet Witch will indeed be magical in nature, something that Whedon has more than his fair share of experience writing about.
Although Robert Downey Jr. is, at the moment, the only confirmed cast member for the ensemble sequel, expect quite a few new and familiar names to be joining the list as the project gears up for production beginning in February 2014.