Avengers 2: Aaron Taylor-Johnson IS Quicksilver

After months as the frontrunner it's now official, "Kick-Ass 2" star Aaron Taylor-Johnson will play Quicksilver in writer/director Joss Whedon's superhero team up sequel "The Avengers: Age of Ultron".

Johnson has reportedly closed his deal for the role says Latino Review

The chatter has been confirmed in Wall Street Journal that "Martha Marcy May Marlene" and "Silent House" star Elizabeth Olsen is indeed playing the role of Wanda Maximoff, a.k.a. Scarlet Witch-sister to Quicksilver.
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While the sequel DOES NOT follow the Age of Ultron comics storyline--in which the big bad Ultron was created by Hank Pym who becomes Ant-Man. James Spader will both voice Ultron, and he'll have to do some kind of motion-capture as well--This news puts to rest the most popular theory suggesting that Tony Stark's (Robert Downey Jr,) robot butler J.A.R.V.I.S. (voiced by Paul Bettany) operating system from the Iron Man Films would turn into the villain.

Marvel vets RDJ, Chris Evans Chris Hemsworth Scarlett Johansson Samuel L. Jackson Jeremy Renner Mark Ruffalo, Clark Gregg and Cobie Smulders who are all expected back

Production on the 'Avengers' sequel is slated to begin in March to meet a release date of May 1, 2015.