As for the women---The best part of the story---are played by Elizabeth Olsen as Wanda Maximoff aka the Scarlett Witch (Daughter of Erik Lehnsherr aka Magneto) and Scarlett Johansson as Natasha Romanoff aka the Black Widow.
Elizabeth Olsen as Wanda Maximoff (Who is both employed by the Brotherhood of Evil (A girl belongs to the Brotherhood of Evil. Don't ask.) and the Avengers (Which presents a huge conflict of interest because she's both supporting and opposing the United States of America)). It appears as if Atlanta, Georgia has been transformed into the fictional African nation of Wakanda (Because actually filming in Africa itself would be much too expensive).
Scarlett Johansson as Natasha Romanoff aka the Black Widow. Scarlett Johansson was pregnant while filming the Avengers: Age of Ultron which required green screen on her baby bump and stunt motorcycle riding. Scarlett Johansson isn't pregnant this time which means she can do a great deal more physical action and actually ride her own motorcycle once again.
Chris Evans as Steve Rogers aka Captain America
Anthony Mackie as Captain America's sidekick #2---Sam Wilson aka the Falcon
I'm guessing this is Frank Grillo as Brock Rumlow aka Crossbones. Be afraid. Be very afraid. In the comic book mini series version of Civil War, Brock Rumlow murders Steve Rogers aka Captain America while claiming to have been ordered to do so by Tony Stark aka Iron Man at the end of the mini-series. Russia Communist employed Bucky Barnes aka the Winter Soldier takes over as the new spirit of the United States of America aka Captain America. The same could happen in the film version of Captain America: Civil War too. Keep in mind that Chris Evans has yet to renew his contract which means he could end up dead in this film.
Scenes from the comic book mini series Civil War---The basis for the currently being filmed colorful action costume super-suit wearing super-hero film Captain America: Civil War.
This comic book panel has nothing to do with the Civil Wars comic book mini series. It simply illustrates what happens when Natasha Romanoff aka the Black Widow engages in behavior that Tony Stark aka Iron Man finds displeasing. Keep in mind that she started out as a Russian spy.