With “Avengers: Age of Ultron” being one of the most anticipated movies of 2015, Marvel is very aware of what teaser cards it still has left to play. Perhaps the biggest card left in its deck is the reveal of Paul Bettany’s character “Vision.” Now, according to Hawkeye actor Jeremy Renner, it looks like the studio might keep fans waiting.

Renner, who is currently out promoting his new movie “The Throwaways,” got a chance to talk to The Hollywood Reporter about the newest and most mysterious character in the Marvel Cinematic Universe. In the interview, the actor revealed that even he’s been kept in the dark about Vision’s final look.

"I haven't seen him," Renner revealed to the outlet. "I kind of keep my head turned away from all of that so I can be surprised when I see the movie. Obviously I saw Paul Bettany in person as the character, but then they do the visual effects and all that sort of stuff. It will be a surprise to everybody in the movie — Ultron as well as Vision, because those characters were so much generated stuff."

It looks like Marvel might be saving the big moment when Vision comes to life for people who purchase a ticket to the film, rather than simply putting a glimpse online and ruining the surprise. After all, Marvel isn't the only party keeping Vision a secret. In a recent interview, Bettany revealed that he’s been keeping the character under wraps for about three years.

So far, the only hint at what Vision might look like in the film comes from allegedly leaked concept art in which Bettany appears to have been drawn in full makeup and costume. The artwork even came with a brief bio on both he and the villain Ultron (voiced by James Spader).

Although Bettany has been a part of the Marvel Cinematic Universe since voicing the artificial intelligence assistant to Iron Man (Robert Downey Jr.), J.A.R.V.I.S., since 2008, his live-action debut will accompany the reveal of new characters such as Scarlet Witch (Elizabeth Olsen) and Quicksilver (Aaron Taylor-Johnson). The new characters will merge with all of the old favorites to take down the impossible new threat, the rogue artificial intelligence robot “Ultron.”

Marvel’s “Avengers: Age of Ultron” hits theaters May 15, 2015.