Actor Sebastian Stan explains how Winter Soldier's backstory will unravel in "Captain America: Civil War."

The 33-year-old actor sat down with Entertainment Weekly and revealed how his character will play a central role in the crossover film.

"This movie certainly deals with what's happened to him. I mean, what have we gotten as a result of Bucky and the Winter Soldier? You know, here's the guy when you merge the two," Stan explained. "This is what came out. To me, he's never really going to be Bucky Barnes again. There's going be recognizable things about him, but his path through the [experiences of] Winter Soldier is always going be there, haunting him."

"He recognizes his past, but at the same time he's sort of a new character, too."

Stan also touched on the Winter Soldier's relationship with Steve Rogers, and how it could change in "Captain America: Civil War."

"We get to see another side of him. I mean you'd wonder, right? After so many years of being loyal and morally impenetrable and always doing the right thing that he wouldn't somehow at some point go, 'Man, like, what am I fighting for? What's my life? What am I living for?' I think this movie very much tackles those questions for Steve Rogers," he said. "He's been questioning things I think for a long time and this is where he's deciding to follow his instincts and not what people tell him is right or wrong."

"Civil War" takes place after the events of "Age of Ultron," where the U.S. government passes a law that requires all superheroes to subject themselves to federally mandated standards in order to regulate superhuman activity on Earth. Iron Man, already publicly known as Tony Stark is in favor of the act, while Captain America believes that the law violates civil rights.

Marvel's "Captain America: Civil War" will release on May 6, 2016.