I was thinking about running Dark Souls atmospheric game set in Greyhawk. The characters wouldn't be undead, but the area would be dark, filled with monsters and undead. I would probably run this with one player, who would be a follower of either Pelor or Pholtus. I'd probably make a new class, similar to the Paladin, but with no holy mounts and more fire-based magic.
In any case, is there a region that would fit easily for this? I'm thinking of either the Hellfurnaces west of the Sea Princes, or somewhere around Iuz. Any suggestions?
Iuz was my first thought, but the Hellfurnaces sounds like a good option as well. I think this could be a fun version of Greyhawk to play. :)