Charles Soule is currently writing the Inhumans Vs X-Men mini-series and has been writing New Inhumans and Uncanny Inhumans for Marvel for three years.
That all comes to an end in March. When his final Inhumans Vs X-Men crossover brings an end to his run on the books with an extra-sized Uncanny Inhumans #20.
What happens next? No idea. People like Al Ewing are picking up Inhumans Prime and The Royals. But the Inhumans comics will definitely be lacking in Soule.