Below you can check out video footage from the Marvel Studios Hall H panel at Comic-Con from last night.
Brolin appears in Guardians of the Galaxy for the first time as Thanos, which gets officially released on Friday, August 1st.
Update: 16 video interviews have been released:
"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, Elizabeth Olsen as Scarlet Witch, Aaron Taylor-Johnson as Quicksilver, Paul Bettany as Vision, with James Spader as Ultron.
Head on over to the Cosmic Book News Avengers movie hub for more.