Marvel announced today that Chadwick Boseman has signed on to play Black Panther in at least 5 upcoming Marvel films, starting with Captain America 3 in 2016.
In the same announcement, they unveiled their nine film Phase 3 slate, including the Black Panther solo movie on November 3rd, 2017.
Doctor Strange is more official now, with a November 4th, 2016. The Inhumans will get their own movie on November 2nd, 2018.
Marvel’s updated slate:
5/5/2015- Avengers: Age Of Ultron
7/17/2015- Ant Man
5/6/2016- Captain America: Civil War
11/4/2016- Doctor Strange
5/5/2017- Guardians Of The Galaxy 2
7/28/2017- Thor: Ragnarok
11/3/2017- Black Panther
5/4/2018- Avengers: Infinity War Part 1
7/6/2018- Captain Marvel
11/2/2018- The Inhumans
5/3/2019- Avengers: Infinity War Part 3