And no, I don’t mean she warged into something like every other theory about people being alive who died.
We are still unclear on where Drogon took Dany, but we hear that he is flying east.
And to the east, there is Essos.
And on the western coast of Essos, there are the nine free cities.
And in the nine free cities, there are red priests.
Is it possible the Drogon knew about the resurrecting powers of red priests and priestesses and flew “our kween” to one of the free cities (such as Myr or Asshai, the two cities that were the homes to Melisandre and Thorace, respectively, who both brought people back throughout the show), and then the lord of light decided he was not done with this particular pawn of his, and a priest successfully brought her back.
If so, would the free cities recognize her as any sort of leader? After Jon killed her, would she want any type of leadership? Is it possible she would attempt to rebuild the Valyrian Empire? After all, the free cities are the last remnamts of that great dynasty. And the Targaryans are the last noble blood of it