Despite appearing in a Comic-Con poster last summer and various images of leaked promotional artwork, Marvel's most interesting new member of The Avengers has yet to get an official debut. After voicing the character of Tony Stark's (Robert Downey Jr.) artificially intelligent assistant J.A.R.V.I.S. in the Iron Man trilogy and the first Avengers movie, Paul Bettany steps in front of the camera as The Vision in The Avengers: Age of Ultron.

The Vision wasn't included in the first teaser trailer for Age of Ultron, nor did he appear in the sizzle reel at Comic-Con or any official stills since, but we did have the chance to see him in person on set last year, albeit without the special effects needed to complete his costume that are added during post-production. The second trailer for The Avengers 2 unfortunately still holds back on revealing The Vision and instead, fleshes out the doom and gloom scenery of the original teaser, setting up his reveal for later.

The second official Age of Ultron trailer instead offers a better look at Ultron in action, with a few additional bits of dialogue. The focus however, is squarely on The Hulk losing control. Where early marketing had us wondering if the Hulk was fighting an Ultron-controlled Iron Man or if he's being setup, it's made much more clear here that he does in fact, lose control and that Iron Man must battle him to stop his rampage. Writer and director Joss Whedon wasn't kidding when he said Ultron would get under the heroes' skin and test their team strength.

Official synopsis for The Avengers 2:

Marvel Studios presents “Avengers: Age of Ultron,” the epic follow-up to the biggest Super Hero movie of all time. When Tony Stark tries to jumpstart a dormant peacekeeping program, things go awry and Earth’s Mightiest Heroes, including Iron Man, Captain America, Thor, The Incredible Hulk, Black Widow and Hawkeye, are put to the ultimate test as the fate of the planet hangs in the balance. As the villainous Ultron emerges, it is up to The Avengers to stop him from enacting his terrible plans, and soon uneasy alliances and unexpected action pave the way for an epic and unique global adventure.

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More: The Avengers 3 & 4 Officially Dated & Titled

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Marvel’s “Avengers: Age of Ultron” stars Robert Downey Jr., who returns as Iron Man, along with Chris Evans as Captain America, Chris Hemsworth as Thor and Mark Ruffalo as The Hulk. Together with Scarlett Johansson as Black Widow and Jeremy Renner as Hawkeye, and with the additional support of Samuel L. Jackson as Nick Fury, Don Cheadle as James Rhodes/War Machine, Cobie Smulders as Agent Maria Hill and Stellan Skarsgård as Erik Selvig, the team must reassemble to defeat James Spader as Ultron, a terrifying technological villain hell-bent on human extinction. Along the way, they confront two mysterious and powerful newcomers, Wanda Maximoff, played by Elizabeth Olsen, and Pietro Maximoff, played by Aaron Taylor-Johnson, and meet an old friend in a new form when Paul Bettany becomes Vision.

The Avengers: Age of Ultron releases in theaters on May 1 2015, followed by Ant-Man on July 17 2015, Captain America: Civil War on May 6 2016, Doctor Strange on November 4 2016, Guardians of the Galaxy 2 on May 5 2017, Spider-Man on July 28, 2017, Thor: Ragnarok on November 3 2017, Avengers: Infinity War - Part 1 on May 4 2018, Black Panther on July 6 2018, Captain Marvel on November 2 2018, Avengers: Infinity War - Part 2 on May 3 2019 and Inhumans on July 12, 2019.

Source: Marvel