This is right up my street. I've dabbled in Inq28 since I got back into the hobby a year or so ago, and I've been waiting for the same sort of thing to happen for AoS - I don't really do armies, more characters and stories. Here's my first attempt at something for The Dark Age of Sigmar.
Ever since his wife died, Malur Grimshade has travelled the realms in search of the Chalice of Resurrection, the only thing capable of returning her to him. Many things have changed since he set out centuries ago - his retainers have lost the very flesh from their bones, and he has been altered from a mortal man to a creature of darkness and hunger. His quest consumes him still and may forever, the shade of his wife forever driving him on in guilt, madness and bloodlust.