The ABC special, "Marvel Studios: Assembling A Universe," recently aired revealing The Avengers 2 concept art.
We see art for the Hulkbuster suit that is part of the South Africa scenes; art for Scarlet Witch, Quicksilver and Iron Man as well.
We also got a peek at some behind-the-scenes action from The Avengers 2 South Africa set which revealed a Hulkbuster repulsor arm.
You can also watch set video featuring the Iron Man vs. Hulk scene, and head on over here for the Guardians of the Galaxy images.
Updated: with video from the ABC special below.
Update #2: Marvel released three official pieces of concept art.
"The Avengers: Age Of Ultron" hits May 1, 2015 directed by Joss Whedon starring Robert Downey Jr., Chris Evans, Chris Hemsworth, Scarlett Johansson, Mark Ruffalo, Jeremy Renner, Samuel L. Jackson, Elizabeh Olsen as Scarlet Witch, Aaron Taylor-Johnson as Quicksilver with James Spader as Ultron.
Head on over to the Cosmic Book News Avengers movie hub for more.