[Porsche-O-Phile]

OK try this one on for size (just popped into my head):

Galactica finds its way to earth only to find any traces of human habitation long since gone/destroyed. The cylon base ship shows up along with pursuing "hostile" cylons initially looking to blow both the humans and the turncoat cylons (on the base ship with Roslyn) out of the sky. Cooler/more spiritual heads prevail and it is decided that Hera and Tigh/6's kid (we'll assume male) are sent to the surface of Earth to form a new settlement demonstrating new goodwill between the two races.

Everyone's happy and Hera/no-name-kid become "Adam and Eve" giving birth to a new race (us).

The only problem is that makes us 3/4 cylon I guess. Unless it's some kind of thing that genetically gets purged out. Dunno.

Plausible?