Al Qadim
Darksun (set back to original boxed set)
Ravenloft (set to Realms of Terror boxed set)
Greyhawk (set back to the original boxed set and Gary's dragon articles for deity's)
Forgotten Realms (set back to the original boxed set, "gazetteers", and 2e deity supplements)
Mystara (the known world Gazetteers, remove tortles).
edit: Birthright