Just last week, we brought you the news about Anthony Mackie (Gangster Squad) being in talks to join the cast of Marvel Studios forthcoming Captain America: The First Avenger sequel, Captain America: The Winter Soldier, which is being helmed by directors Anthony Russo and Joe Russo.

Recently, Anthony Russo spoke with HuffPo about the sophomore outing for the star-spangled superhero.

What did they like about Ed Brubaker‘s Winter Soldier storyline:

“Well, we like the [story.] I can’t talk too much about specifics, that’s the way Marvel handles things. I can say in general that there’s sort of a darker, edgier sensibility at work there that we found appealing, and that is going find its way into Captain [America] in the modern day.”

Are World War II flashbacks possible?

“Certainly Cap has this complicated history. We’re making the movie for first-time viewers, not just for fans, so, because Cap does have this complicated history — he was this skinny guy who became a super-soldier, he was born back then and he’s living [now] — in the storytelling, you need to convey that to an audience who doesn’t know Cap’s story.”

Are they getting any advice from comic book writers or creators?

“We’re actually going to have lunch with Brubaker soon. But no, they haven’t been involved. In the same way that they would develop a new comic-book series, they give its own space to develop. But certainly everybody is aware [of what’s in the comics], has read everything, is aware of all their other material. But they do like each thing to be its own, organic process, which is nice”

Captain America: The Winter Soldier is slated to hit theaters on April 4, 2014.