James Gunn and Michael Rooker filming Guardians of the Galaxy James Gunn Undecided on Guardians of the Galaxy 3 Marvel Studios is gearing up to launch Phase 3 of their cinematic universe with the premiere of Captain America: Civil War, the concluding chapter of Steve Rodgers? (Chris Evans) trilogy. Phase 3 will continue on to include more Avengers films in the two-part Avengers: Infinity War as well as a number of standalone features like Doctor Strange and Black Panther.