Here’s what Joss had to say about choosing Spader for the Avengers sequel:
“Spader was my first and only choice. He’s got that hypnotic voice that can be eerily calm and compelling, but he’s also very human and humorous. Ultron is not Hal (from 2001: A Space Odyssey). Spader can play all of the levels. He’s the guy to break The Avengers into pieces.”
Source: SuperHeroHype
