During an interview in Beijing, the Russo brothers confirmed that Scarlett Johansson will be coming back as Black Widow in Captain America: Civil War, which begins filming in April and is set for theaters May 6, 2016.
Anthony Russo said, “We’ve been preparing for the movie since the last one debuted last year…So, we’ve been working on it for a long time now. We’re very happy how it’s coming along. Captain America 3 is going to be called Captain America: Civil War,and it’s going to star Chris Evans. Scarlett Johansson will be back, Winter Soldier will be back, and Robert Downey Jr. as Iron Man will also be joining us in the next film.”
Source: