My initial comment of " The Inhumans are no X-Men!" was tongue in cheek joke about the current situation of the X-Men and Inhumans situation on the small and big scale. The punchline is that no one is clamoring for more Inhumans material or an Inhumans movie. Marvel keeps trying to make the Inhumans "happen" and to do this they've taken to supplanting role the X-Men fill. If you didn't think it was funny, that ok.
I know Disney and Fox own the film rights to the respective IPs. However, I like to imagine that all Inhumans plans Marvel has would be scrapped in a heartbeat, if they knew they had access to the X-Men film rights. I imagine a big turn around to undo the bad situation Marvel has saddled the mutants with in the comics. But with the kind of money Fox is making off their X-properties, I don't imagine that will ever happen anytime soon.
On one hand, I feel bad for Marvel since it really is their brainchild and they've proven that they can make good / fun movies. On the other hand, I don't feel bad for them at all since it was their idea to sell those IPs in one of the most colossally stupid ways imaginable. "As long as you do something with it every X years, you get to keep it, no extra money for us [I presume] or anything!"
But that said, yeah. The Inhumans just aren't the X-Men no matter how much they effectively are. It's pretty much because
certain X-Men are popular, though, as most of the well-known Inhumans are... well, just annoying assholes with powers that are also annoying. I mean, yay, their most powerful leader is a guy who can't say a single word! And that's pretty much the only thing anyone who knows of him outside of really hardcore Inhuman fans know about him. "Oh, and there's that one chick who, like, has living hair or something, too, right?"
They're just never going to catch on despite Marvel's best efforts.
Maybe the movie will change that if they manage to pull another
Guardians of the Galaxy with them, but I kinda doubt it.
But hey, at least they're gaining limited access to Spider-Man, so maybe there
is some hope of them doing the same with the X-Men at some point in the future. It's just a shame that they're basically being screwed in the way
they should have screwed the studios in the first place by only gaining limited access to the characters. I mean, how sad it is when you have to get someone else's permission to use your own characters in your own stories?