There haven't really been any outright resurrections on Dwilight yet. I think Morek Empire would probably be the closest. But the original "Morek" realm never really "fell". It expanded, absorbing Springdale, then reformed into its original, smaller size through a secession of the original Morek capital. That formed "Xinhai" in the same regions as the original "Morek". Tom later renamed it to "Morek Empire", but refused to give it back the exact original name.
There have been two or three realms in the Rettleville area, but they weren't really resurrections of old realms. Same with D'Hara being in the same place as Shadovar. Same location, completely different realm.
Niselur will eventually (hopefully?) be recreated in the Darfix area. I hope to convince them to use a variation of the original name, though.
