Marvel has acknowledged that the 1st trailer for 'The Avengers : Age of Ultron' was leaked today, and shows never-before seen footage of the movie which is scheduled for release in May next year (although the trailer disagrees with this date). It is unclear whether the leak was intentional or accidental, but fans have been quick to take note of the latest visual clues in this trailer.

The Avengers ensemble

Back in 2012 'The Avengers' grossed over $1.5 billion at the box office worldwide and was a domestic hit bringing a host of big action heroes to the screen.