Thor, Captain America, Hawkeye, Iron Man and War Machine reunite to battle a new enemy called Ultron in The Avengers sequel.
Bruce Bannner and Tony Stark collaborate in the lab.
Captain America and Thor suit up and prepare to fight evil.
Director Joss Whedon gives the actress notes on set.
The brother-sister duo of Quicksilver and Scarlet Witch are the newest members of The Avengers.
Hawkeye runs for cover after an explosion in the woods.
Black Widow sets her sights on her next target.
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