Marvel shocked its fans today by releasing the third trailer for “Avengers: Age of Ultron” a day ahead of schedule. While the trailer revealed a ton of great new things like group shots of the gang in battle, a first look at Klaw's claw, Captain America getting straight up punched in the face and more Hulk-busting, the trailer’s biggest reveal came at the very end. In true Marvel fashion, the teaser had a sort-of post-credits scene that finally gave fans their first look at Paul Bettany as Vision.

While announced several months ago, the character has been kept hidden for two trailers, countless teaser images, the film’s official poster and more. It appears that director Joss Whedon desperately wanted to keep the character a secret as his reveal will likely be integral to the plot of “Age of Ultron,” hence why we only see a very brief close-up of his eyes. In an interview with Empire Online, Robert Downey Jr. hinted that Whedon was keen on saving the true reveal of Vision for those who buy a ticket in May. With the movie a little less than two months away, it looks like this will be the last trailer fans get before it opens, and the only glimpse of the new character until then. Even Bettany’s co-star Jeremy Renner has not seen the character’s finished product.

Bettany, who can boast being one of the longest-running cast members in the Marvel Cinematic Universe thanks to his job voicing the A.I./butler of Tony Stark (Robert Downey Jr.) since the first “Iron Man” film in 2008, recently revealed he has been keeping his role as Vision a secret for about three years. With Marvel giving its fans a tiny glimpse at the character, many may be wondering who exactly Vision is, and why he’s so important to “Age of Ultron.”

Unfortunately, with his movie self still shrouded in mystery, the only evidence comes from the comic books. According to Screen Crush, the character is a sentient artificial being made by Ultron (James Spader) to be superior to the human race. He’s got organs, a blood substitute and the ability to reason. However, the villain keeps control of him through a crystal embedded in his forehead. Luckily for the Avengers, the comic book Vision overcomes his control crystal and betrays his creator to help our heroes. It’s possible, though, as Vulture points out, that the character in the movie will be made instead by Tony Stark. Many believe that Vision will simply be J.A.R.V.I.S. 2.0 and start out on team “Good Guys” right out of the box.

Many fans have speculated that the brief look at Vision reveals something larger about the Marvel Cinematic Universe. Many already are calling that crystal in the character's forehead the next Infinity Stone.

Ever since Whedon teased the existence of Thanos in the end credits of the first “Avengers,” savvy Marvel fans have been on the lookout for the six gems that will ultimately give the villain power. Thanos appeared in the mega-hit “Guardians of the Galaxy” and it has been revealed that the third installment in the “Avengers” franchise will be split into two parts titled “Infinity War.” As notes, a stone in the middle of a character’s head that has the power to bring him to life and control his powers kind of has “Infinity Stone” written all over it. Could Vision come face to face with Thanos at some point in Marvel’s upcoming third phase of movies? So far three of the six stones have been featured throughout the Marvel Cinematic Universe including the Tesseract in “Avengers,” the Aether in “Thor: The Dark World” and the Orb in “Guardians of the Galaxy.”

It looks like those curious about Vision’s origin simply will have to get in line on May 1, when “Avengers: Age of Ultron” hits theaters.