The Avengers 2 Vision is one of film's best-kept secrets, and Paul Bettany has spent many years making sure it stayed that way.

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Well-known as the voice of JARVIS, Bettany found out long ago that his character would become the Vision in later Avengers stories. As fans are still trying to puzzle out exactly what will prompt the transformation and what ramifications the AI will have on the story, the British actor is determined to keep his role on the DL.

"I can tell you that I've kept it a secret for about three years," Bettany informed Collider. "I've known that this was going to happen and I'm not about to give the game away right now because we've managed to keep it really under wraps. There are only a few images out there but it's... It's pretty grand."

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Although The Vision isn't the only Avengers newbie coming to Age of Ultron, he is the only one that has not appeared in any of the film's trailers. However, a little summary of the AI's background did surface in a trading card format.

"Programmed by the combined geniuses of Tony Stark and Bruce Banner and imparted with the ability to fly, project intense energy beams and change the density of his form, the Vision has proved himself a worthy hero, aiding the Avengers in their struggle against the evil A.I. Ultron," read the leaked images, according to io9.

Find out more when The Avengers: Age of Ultron enters theaters on May 1. Click the video below to see a (sadly) Vision-less trailer.

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