I grabbed one character from a different setting. Made for some serious roleplay possibilities. Especially fighting the Sorcerer King in Dark Sun's lost city.Oh, I'd ignore the reference to FR and place it entirely in Greyhawk. If the adventure makes this difficult, that is a point against it for me.
FR: we are screwed!
DS: OUR DEATHS WILL BE LEGENDARY
DL: What? It's only one dragon!