Marvel Studios Kevin Feige recently announced that the "Inhumans Movie" will be taken out of the Phase 3 MCU films. This is due to some complications mainly the return of Spider-Man to the MCU. Spider-Man was well-received in "Captain America: Civil War"
It may be too early to speculate as the Inhumans movie, featuring the Inhuman Royal Family won’t be out until 2019. There’s buzz however that the TV show, Agents of SHIELD won’t be crossing over with the movie.