If this set is as good as the Frostgrave soldiers set then I'll be very happy. They'll make great cultists and possibly witch hunters. Being able to interchange parts with the soldiers set as well as the GW plastics creates a lot of possibilities.
These sets look wonderful! I've been thinking about starting a possessed warband and as Dave said, the possibilities for combination with the soldier set and other GW humans is immense! Definitely going to order me a couple!