I am going to set it in the Age of Anguish, just after the Dwarves got to the surface. The sky will still be reddened by the dust of Starfall. There will be no gunpowder, alchemists, or printed works. Real points of light stuff. Humankind thinned out, and the orc hordes still the masters of the world. I will scratch my Earthdawn/ Midnight/ Dark Sun itches, and make it as grim and dark as I can.
After Belkzen, before Kazavon. The dwarves lost their hall in living memory.
This is AWESOME! Please keep us updated with how it goes when you finally do start!