Marvel Studios has a tradition of rewarding those who stick around to the very end of its movies, and many of the post-credits scenes serve as a lead-in or introduction to a future installment in the Marvel Cinematic Universe with special guest-directors. It looks like the upcoming "Captain America: The Winter Soldier" is no different, as Collider reports that "Avengers: Age of Ultron" director Joss Whedon stepped in to direct one of the film's post-credits scenes.

"The Russos directed one of [the post-credits scenes] and Joss Whedon directed the other," Marvel Studios head Kevin Feige told Collider. "I think you can figure out which."

This isn't the first time Whedon has helmed a post-credits scene -- he previously directed one for "Thor," which featured Nick Fury showing Erik Selvig the Tesseract as a lead-in to "The Avengers." It seems safe to assume that "The Winter Soldier's" post-credits scene will give some kind of nod to "Age of Ultron," but the content is anyone's guess. Considering the tradition of recent post-credits scenes -- such as "Guardians of the Galaxy" director James Gunn's "Thor: The Dark World" scene involving Benicio Del Toro's Collector -- it seems likely that more than one familiar face might show up. Either way, it's just one more reason to get excited for "The Winter Soldier" debut on April 4.

Directed by Joe and Anthony Russo, "Captain America: The Winter Soldier" stars Chris Evans, Scarlett Johansson, Sebastian Stan, Samuel L. Jackson, Robert Redford, Frank Grillo, Georges St-Pierre, Cobie Smulders and Maximiliano Hernandez.