Hussar
Legend
Well, that is one of the bigger hurdles of Greyhawk - you mention Kara Tur was originally supposed to be on Oerth, for example.
Thing is, SO MUCH of what was original in GH has been exported to other settings - a lot of the monsters have become either "generic D&D" or plunked down in this or that setting (typically Forgotten Realms). A lot of the demon/planar stuff got ported over to the Planescape setting with various demon lords, gods and whatnot becoming again, either "Generic D&D" or stuffed into specific settings.
It does make any update to Greyhawk somewhat of a challenge since so much of the meat of has been picked off by scavengers over the years.
Thing is, SO MUCH of what was original in GH has been exported to other settings - a lot of the monsters have become either "generic D&D" or plunked down in this or that setting (typically Forgotten Realms). A lot of the demon/planar stuff got ported over to the Planescape setting with various demon lords, gods and whatnot becoming again, either "Generic D&D" or stuffed into specific settings.
It does make any update to Greyhawk somewhat of a challenge since so much of the meat of has been picked off by scavengers over the years.