Just been catching up on Agents of SHIELD and starting to think... Isn't an Inhumans movie a bit redundant at this point? They've been covered extensively on AoS, meaning their origin story has now been done, and it feels like the only options would be to carry on from what's already established (meaning that anyone who doesn't watch AoS, which let's face it covers the vast majority of casual moviegoers, would have no idea what was going on) OR basically do a reboot origin story and completely break the combined MCU.
Wonder if they've shelved the film because they've realised that they used up the entire storyline in AoS