Lincoln actor James Spader has just been cast as the major villain in "Avengers: Age of Ultron". We originally thought that Vin Diesel was secretly cast as Ultron, until he was confirmed as the voice of Groot in Guardians of the Galaxy. I personally think that James Spader would be near the bottom of my casting list. I don't know who I would pick, but it wouldn't be him. But there is a lot more back-story behind this character. As Joss Whedon announced that they would be creating their own origin story completely unrelated to Ant-Man. So far we know that Tony Stark will create Ultron, and we know that JARVIS will have a big role in the film. "Movie detectives" from Geek Magazine came up with the idea that JARVIS will evolve into Ultron. We know that Ultron's body will still be made completely of Adamantium, the indestructible metal that Wolverine's claws and skeleton are made of. Thanos will still be in "The Avengers: Age of Ultron as a supporting villain. Thanos will also be the Major villain in Guardians of the Galaxy.
In conclusion, James Spader will be Ultron, and the entire Marvel Cinematic Universe is expanding, and to wrap up this wrap up, here are the release dates in the future of the MCU.
"Thor: The Dark World" November 8th, 2013
"Captain America: The Winter Soldier" April 4th, 2014
"Guardians of the Galaxy" August 1st, 2014
"The Avengers: Age of Ultron" May 1st, 2015
"Ant-Man" November 6th 2015.
Potential Projects:
Doctor Strange (Confirmed)
Iron Fist
Black Panther
The Runaways.