Captain America: Civil War features a ton of Marvel superheroes, as Captain America (Chris Evans) and Iron Man (Robert Downey Jr.) battle, as their fellow Avengers – and some new allies – must decide which side they’re on.

(L to R) Hawkeye/Clint Barton (Jeremy Renner), Scarlet Witch/Wanda Maximoff (Elizabeth Olsen), Captain America/Steve Rogers (Chris Evans), and Winter Soldier/Bucky Barnes (Sebastian Stan) in captain America: Civil War.

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Jeremy Renner in Captain America: Civil War.

Elizabeth Olsen in Captain America: Civil War.

Joining Captain America in battle are both Hawkeye (Jeremy Renner) and Scarlet Witch (Elizabeth Olsen), as the two Avengers align with Winter Soldier (Sebastian Stan), Falcon (Anthony Mackie) and Ant-Man (Paul Rudd) against Iron Man’s team.During a visit to the set of Civil War, Renner and Olsen sat down with press to discuss where the film finds their characters after the events of Age of Ultron, what it's like to have friend battle friends in this movie and why Chadwick Boseman’s Black Panther costume is the most difficult for any of the cast members to wear.We leave Scarlett Witch without a home, without a family, and she ends up creating a surrogate family within the Avengers and making a decision to be a part of the team. I think a lot of that has to do with Jeremy’s character – like his attitude towards her and the speech he gives her at the end of the film. So we pick up with her having started a new life, but still trying to figure out what her abilities are and if using them causes greater good or greater damage.Marvel’s really smart about continuing the storylines of all the different movies from Ultron into this one and blah blah blah blah – it’s pretty seamless. So where we left off in Ultron is definitely picked up in Cap 3 here, pretty smoothly I think.I think that’ll always be there for Barton. You have real life and then you have fight life. And that’s the character that I love now – discovering that in him makes him a very sort of accessible Avenger. That’ll always be there, I’m sure. And it certainly plays in this one.I think there’s a great connection between these two characters for sure. I mean, I don’t know if she’s coming over for dinner on the Barton ranch… [laughter]Yeah, I don’t know... I could be!She may or may not, I dunno. Maybe with Vision…Yeah, totally. I do think in this film we try to tie together that their relationship has gotten stronger, that their friendship has gotten stronger from the last film.I can’t totally talk about why we divide, but it’s interesting, because we’re doing this scene today that’s sort of the pinnacle of that. Two gangs fighting against each other, ultimately knowing that, ya know, it’s like friends fighting friends. To me it’s fun, personally [Laughs], but no one wants to kill each other…Just try to get from point A to point B without getting in someone’s way.Yeah, yeah, it’s all fun and games until someone loses an eye type of thing. There’s that kind of irreverence to it; the humor and in the reality of what’s really going on that plays into this movie.Nah, he’s not a spy like Natasha. She’s a little more slippery in her decision-making, maybe. But Barton is a pretty brass tacks kind of guy. Kinda get the job done so I can go home. So I don’t think it’s very difficult for him to decide.Yeah. I mean, we’re all on one compound together, so we are a team at this point. So there’s a lot of group scenes of us, just like conversationally and in action. I think her relationships with people become really clear, and I think they all make tons of sense in line with Age of Ultron as well.There’s always something different. He’s still limited to what he can do – ya know, no super powers, just a high skill set. But they have a cool thing... This time I learn very quickly with the bow. Beause in the first Avengers, he had that short bow that cracks open, and then I can crack and close with a staff. So now I’m a master with a staff apparently. I have to learn that today. [Laughs] So there’s that, and then there’s always things you can do with the [arrow] tips. Except for this, what they call the arrow tips, they’ll all be non-lethal, because again, we’re not trying kill anybody - just sort of take control of the situation. They’ll probably throw in a lot of gimmicks with the tips and trick arrows, and things like that. I love this costume the most of them all so far, the one I’ve got. It’s got a cool vibe to it. Very, very cool. It’s very comfortable. I’m still hot, but it’s fantastic, I love it. And it’s got cooler colors. I like it!We look unified in our costumes…Yeah yeah, that’s correct.Yeah that self-deprecating, irreverence – all that sort of Han Solo-ish, old school Indiana Jones kind of thing. That’s fun to play. I’m only here for a short amount of time, but getting a lot done. We’re having a lot of fun. That’s also what’s so great about the Russo brothers. Literally they’ll have a line that’s pretty good and have a couple of alts that waere good, and then we can just throw in whatever the heck we want. Joss was good with that with me too in the last one; just kind of throwing in some funny lines. I think we’re gonna have a few zingers in this one too, I hope.It broadens the globe of Marvel. I mean they’re doing an Ant-Man film, so getting him for part of this makes sense.It’s like a video game, really. Everyone’s got different attributes. You look at Ant-Man and you learn more about him. And you look at Black Panether, who’s sort of like a Hawkeye or others in that he doesn’t have super powers, just a really great skillset. It’s just a great balance and mixed bag to add to the Marvel universe.He has the worst costume, Black Panther.I know, that poor guy. It’s the worst of any Marvel character.Yeah, I thought Ant-Man was bad, and then I saw him.Yeah, Cap would complain about his cowl and it’s like dude, he’s got three on! Terrible, sweating – if it takes you 30 minutes to go to the bathroom, that’s a problem.

Captain America: Civil War opens May 6th.Eric Goldman is Executive Editor of IGN TV. You can follow him on Twitter at @TheEricGoldman , IGN at ericgoldman-ign and Facebook at Facebook.com/TheEricGoldman