After the release of Avengers: Age of Ultron, it sounded like Joss Whedon was done with the Marvel universe. He claimed the sequel 'broke him'. And he still hasn't chosen his next project as a director. But it seems he's not quite done with the characters he helped transition to the big screen in the 2012 blockbuster Marvel's The Avengers, especially good old Captain America.

Joss Whedon, who wrote both 2012's Marvel's The Avengers and Avengers: Age of Ultron, hasn't quite said everything he wants to say about this iconic Marvel superhero. And to help celebrate Captain America's 75th birthday this month, he's heading back to the character's place of origin. Yes, we are getting a brand new story set within the Marvel comic book universe penned by Joss Whedon himself.

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Joss Whedon has teamed up with Astonishing X-Men artist John Cassaday for a special 75th anniversary issue of Captain America: Sam Wilson. This particular issue will also include a main story from the comic's creative team of Nick Spencer and Daniel Acuna. There will also be a third story from Greg Rucka and Mike Perkins.

This isn't the first time Joss Whedon has written specifically for Marvel comics. He previously teamed up with John Cassaday to collaborate on an Astonishing X-Men story that debuted way back in 2004, before the Marvel Cinematic Universe exploded as the movie juggernaut it is today. A lot has changed since then, on both the big screen and printed page, when it comes to these iconic characters.

Neither man is a stranger to Steve Rogers plight in life. Joss Whedon has directed the two movies revolving around the character. And Cassaday drew Cap for a limited comic book series that debuted shortly after 9/11. Though, this comic follows new Captain America Sam Wilson, played by Anthony Mackie in the MCU. No story details have been released about the pair's latest team up. Captain America: Sam Wilson is in comic book shops across the country starting March 30.