If only Disney/Marvel had a time machine. They could go and dump the series in the 90s and just say that it was made then at a time when comic book adaptations were not as good and low budget. That would be the best thing for them. Then it would be like earlier TV adaptations of Thor or the Incredible Hulk etc.
If the Inhumans show up again, I'd like them to appear first in a Fantastic Four film. Maybe the FF can fight the Frightful Four at the start with Medusa as part of their lineup. She can be an amnesiac who has gotten caught up with the wrong crowd.
Perhaps after the fight with the Frightful Four, the Royal Family come looking for Medusa. At first the FF think that the Royal Family are helping the Frightful Four, but when they also attack them too, it appears that they're not on either side but only want Medusa back.
Reed can realise that Medusa isn't like the other criminals, and that she seems to be suffering from memory loss, and this leads into the bigger plot about the Inhumans.
So Frightful Four as opening sequence villains in an FF movie, leading onto the Inhumans as the main plot.
Ben Grimm can make a joke to one of the Royal Family to look on the bright side. At least she had amnesia and not a shaved head.
