Just when you think that James Spader is just a voice of our robot villain in the Avengers sequel you could not be more wrong, Not only will James be portraying the voice for Ultron but he'll also be playing the character.
"We did not hire James Spader to do a robot voice," Feige said. The producer added, "He's a very unique and incredibly exciting and unpredictable actor. And Ultron in the comics is a robot, but what's cool about him in the comics -- and certainly how Joss Whedon is interpreting him for the movie -- is that he is much more than just a robot. ... He's infused with much character."
Using full motion and face capture to add to Ultron's character? James Spader is amazing and this is something that will add a more personal feel to Ultron he's humanized which adds to the fact that he hates humans enough to basically bring the heroes on the brink of extinction and this is a performance that cant get here sooner!