Are the Emperor's Children Cynabites?
They just seem like an obvious rip off from "HellRaiser" now with Fulgrim being pinhead. It is not that I dislike the way they are written, and I honestly can't think of a better way to represent a Chaos 'pleasure' god... but it really isn't original.
Or is it? Was the original Warhammer concept of the 4 chaos gods before or after 'Hellraiser'? Not sure who ripped off who, but I think it is safe to say it is the same idea.