'Avengers: Age of Ultron' trailer: James Spader is a terrifying Ultron; Robert Downey Jr's Iron Man debuts the 'Hulkbuster Suit'

"I'm gonna show you something beautiful," says James Spader as the ruthless, metallic Ultron. The camera then pans to people staring in dismay at destruction, buildings collapsing, Hulk, sitting down, hugging his knees.The first look at Marvel's highly-anticipated sequel to 'The Avengers' is darker than its predecessor.Fans of 'Avengers: Age of Ultron' are in for a long wait, as the film is set to hit the theatres on May 1, 2015.

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