Why not return of Abalach-Re? Pretty sure someone as wily as her has contingency plans against death. It would be hilarious if the avangion “Rafernard” revealed himself before Oronis and became the ruler of Raam.
The Paizo version of Dark Sun returned Andropinis. In my campaign the Sorcerer Monarchs that fought Rikus and the other heroes of Tyr were just simulacrums, which accounts for their atrocious performance. Ditto the Borys that appeared there that day.