Each day, Marvel is handing out new pieces to a giant AVENGERS: AGE OF ULTRON poster puzzle at San Diego Comic Con. Concept art for Iron Man, Scarlet Witch, Black Widow, Captain America, Hawkeye, and Quicksilver (with Vision in the background) have already been released with Hulk and THOR sure to follow. See the Avengers overwhelmed by Ultron in the awesome art below!

UPDATE: Thor and Hulk posters complete the epic puzzle!

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