Originally Posted by
Force de Phenix
They haven't appeared in the past five years, and the royals pretty much failed. There's no financial incentive either, so I don't believe they will get another series, no. They'll pop up in cameos though. They're basically going back to their 80's status. In the 90's, Crystal was very present and in Earth X, the inhumans played a big role, then came Marvel Knights, War of Kings, etc.
The final result was a result of everything I mentioned. A website published articles saying that they canceled X-Men merchandise and to blame the inhumans, and it got to a point where people hated the IP "Inhumans" without knowing the characters. The same thing happened with other IP's at the time, so it wasn't just the inhumans that suffered in sales because of it.