The hero is described as a "key figure" in the conflict between Chris Evans' Captain America and Robert Downey Jr.'s Iron Man. However, his allegiance is in flux.
"There definitely is a sort of tradition that he's torn between, in terms of how things were done in the past and how things need to happen now in this new world," Boseman tells EW. "I think there's perhaps a bit of a maverick there, and then there's also a need to live up to traditions and his father's legacy. And not even his father's legacy, but the entire nation of Wakanda. I think those are the things you will see."
Marvel Studios President Kevin Feige adds that Black Panther is introduced in "Civil War" ahead of his 2018 solo film because the story required a character with his own agenda.
"We kept talking about 'Somebody like Black Panther ...' After the third or fourth time that came up in a development meeting, someone said, 'Can't we just do the Black Panther?' And we all looked at each other and said, 'Yeah, I guess we could,'" Feige says. "We introduce him here, give him an arc, and make him a full character. We don't just give him a cameo, to wave. He has his own conflict and his own people that he's looking out for."
Directed by Anthony and Joe Russo, "Captain America: Civil War" opens May 6.