The Avengers 2: Age of Ultron will pit Iron Man against the Hulk, but the epic battle won't just be eye candy for the big screen.

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Ever since the upcoming fight sequence was filmed in Johansesburg, images of Iron Man's (Robert Downey Jr.) Hulkbuster armor have been floating around the Internet. Despite the impressive setup, Downey believes the backstory is truly important part.

"It can't just be a good fight, it's gotta be about something," said Downey at the 2014 San Diego Comic-Con, according to HitFix. "And the great thing in 'Age of Ultron' is, that fight between [the Hulk and Tony Stark] is, nobody wins when two people who are friends fight."

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Unfortunately, the reasons why the two Avengers will go toe to toe are still unclear. Whatever their feud may be, it will lead to quite a bit of destruction in the South African city. To see a video of the upcoming battle before the CGI, click here.

Find out more when The Avengers: Age of Ultron bursts into theaters on May 1.

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The Avengers 2, Avengers: Age of Ultron, Marvel, Movies