With a big trailer now out there and the release only six months away, we pretty much thought we knew the entire cast of Avengers: Age Of Ultron . Joss Whedon is once again the writer and director, and in front of the camera we have the exhaustive roster of Robert Downey Jr., Chris Evans, Mark Ruffalo, Scarlett Johansson, Jeremy Renner, Chris Hemsworth, Samuel L. Jackson, Cobie Smulders, James Spader (via performance capture), Paul Bettany, Don Cheadle, Elizabeth Olsen, Aaron Taylor-Johnson, Andy Serkis and Thomas Kretschmann . But, it turns out, there was still room for more. This could be construed as significant spoiler territory , so if you want to know nothing, or feel you already know too much, we're giving you ample opportunity to look away. Here's that extended trailer from last week again. You may not want to look underneath... Right, you were warned. So if you're still here the news is that Idris Elba , in a mischievously unguarded moment with the Telegraph