Thanks to various casting calls, Captain America: Civil War looks to start filming around April 1st at Pinewood Studios in Atlanta, Georgia.
In addition, a short synopsis has been released revealing the events from The Avengers: Age Of Ultron directly impact Captain America 3 as well.
Following the events of Age of Ultron, the collective governments of the world pass an act designed to regulate all superhuman activity. This polarizes opinion amongst the Avengers, causing two factions to side with Iron Man or Captain America, which causes an epic battle between former allies.
Captain America: Civil War has a May 6, 2016 release directed by Joe and Anthony Russo starring Robert Downey Jr. as Iron Man, Chris Evans as Captain America, Scarlett Johansson as Black Widow, Sebastian Stan as Winter Soldier, Anthony Mackie as Falcon, Frank Grill as Crossboness, Daniel Bruhl as Baron von Zemo, Chadwick Boseman as Black Panther, Jeremy Renner as Hawkeye and it's speculated the new Spider-Man will debut.
Watch the Avengers 2 Cap & Tony Stark arguement clip: