For Force's sake no VIRGINAL CONCEPTIONS or any similar ham-fisted "myth-making" derived from boring-ass Catholicism or Christianity, two of the least interesting, least compelling and downright pathologically perverted goat-herders' ghost stories ever.
That means no resurrection (of Vader, Luke, or anyone else!), no messianic prophesies, no stigmata, no angels (I'm picturing some kind of celestial space-mermaid materializing to give guidance)...