Proving retcons are nothing new, here's two slightly different versions of the origin of the Bronze Age's premiere sexy succubus, Vampirella. This original joky piece is from Vampi's co-creator, professional fan Forrest J. Ackerman, with art by Tom Sutton, and for a while was the direction the strip was going to go in.
But Jim Warren soon realized I guess, that a joky voluptuous vampiress wouldn't have much of a future, so Budd Lewis and Vampi's all-time best artist Jose Gonzalez gently rejigged her with a slightly more serious ( tho' still fantastically pulpy ) origin. This piece, by the way, is a coloured reprint originally from the 1972 Vampi annual, that appeared in the slightly different UK release of the first issue.
'Course, years later, when Harris comics got the franchise, it was all rejigged again, and Vampi was now the daughter of Lilith apparently, born to fight the evil her Mother had unwittingly created.
Pish & tosh. Vampirella came from Drakulon. End of.