Special thanks to @TF3100 for heads up!
So far starring Robert Downey, Jr., Chris Evans, Mark Ruffalo, Chris Hemsworth, Scarlett Johansson, Cobie Smulders, Jeremy Renner, Samuel L. Jackson and James Spader, with Aaron Taylor-Johnson and Elizabeth Olsen in negotiations to join,
The Avengers: Age of Ultron is directed by Joss Whedon from his screenplay, and is slated to begin production in March 2014 and release on May 1, 2015.