Okay, if you’re easily offended along religious lines, please don’t read this post. I don’t mean to offend anybody, it’s just a thought I had.
Let’s say the series ends with the remnants of humanity and cylonity (only the few left alive after the final battle) discovering the real Earth (as opposed to Erf), in prehistoric times. They crash-land on the planet and all of their equipment is destroyed, reducing them to a primordial, pre-technological existence.
Perhaps the cylons and humans can’t interbreed very successfully, but they can breed with the hybrid(s), Hera (and Starbuck?) and their descendents. Maybe Hera is the Mitochondrial Eve.
Thousands of years pass, and Earth becomes slowly populated with descendents of cylons and humans. But their human side prevails in the case of religion, causing a preponderance of polytheistic mythologies… except for one tribe on the eastern shore of the Mediterranean, who perhaps retain a racial memory of their Cylon antecedents.
Then, about 2000 years before the present day, a member of that tribe (named Yeshua, whom the Greeks would later change to Jesus) discovers a cache of Cylon technology, and is able to resurrect after his crucifixion. His example is later used to revolutionize religion along Cylon lines, and monotheism takes over civilization… Western, anyway, but heck, Galactica is an occidentalocentric show.
I know, I’m sure that’s not what the show’s creators have in mind, but it sort of flows logically, eh?
Now I’m not a Christian, but I have nothing but the utmost respect for Christians. I don’t mean to advocate a Jesus-is-Cylon idea, I’m just thinking out loud and perhaps reductio-ad-absurduming.