Many fans have already voiced their approval of the costume tweaks that Byrne made for Age of Ultron, be it Captain America's combat gear - which is closer to his Winter Solider outfit than his not-so-popular suit in the first Avengers - or Black Widow being decked out in TRON-style armor enhanced with electrical attachments. New additions Scarlet Witch and Quicksilver will be wearing their "less flashy" outfits for the majority of the film, by the look of it, but there may be some costume upgrades revealed over the course of Age of Ultron's running time.

There are several players, good and evil, that show up to (briefly) play key roles in the Age of Ultron storyline: Thomas Kretschmann as Hydra head Baron von Strucker, Andy Serkis as Black Panther enemy Ulysses Klaw, Don Cheadle as James Rhodes/the War Machine, and Anthony Mackie as Sam Wilson/Falcon. These characters are featured in the new Age of Ultron images below - showing, among other things, select characters who may be crossing paths onscreen for the first time (be they Tony Stark and Sam Wilson or Ulysses Klaw and big baddie Ultron).

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Avengers: Age of Ultron - Don Cheadle as James Rhodes

Avengers: Age of Ultron - Thomas Kretschmann as Baron von Strucker

Avengers: Age of Ultron - Scarlett Johansson as Black Widow

Avengers: Age of Ultron - Chris Evans as Captain America

Avengers: Age of Ultron - Hulkbuster vs. Hulk

James Spader and RDJ on the Avengers 2 Set

Joss Whedon and Chris Evans on the Avengers: Age of Ultron set

Joss Whedon on the Avengers: Age of Ultron set

Avengers: Age of Ultron - Earth's Mightiest Unite

Avengers: Age of Ultron - Thor, Iron Man, and Captain America

Avengers 2 - Ultron and His Throne

Avengers: Age of Ultron - Tony Stark and Sam Wilson

Avengers: Age of Ultron - Earth's Mightiest Heroes in Battle

Avengers 2 - Ultron and Ulysses Klaw (Andy Serkis)

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

Source: Marvel