...I also see something to do with the first hybrid (he mentions he would return in ways unknown, mwahahahaha).
Moore unfortunately didn't have the chops to come up with a decent way to tie everything together. The hybrid said, "As my own existence comes to a close, only to begin anew, in ways uncertain.... All this has happened before, and will happen again, and again, and again...." At that point every indication was that the whole cycle business was basically the same idea as in Lexx: "Time begins and then time ends/And then time begins once again./It is happening now./It has happened before./And it will surely happen again." The hybrid probably meant that he will exist in the next cycle of time, and the next, etc.
He also said, "Kara Thrace will lead the human race to its end.... They must not follow her." While it is likely that almost all of the colonials died within a couple of years, those that didn't were absorbed into the native population. We have to be pretty generous to give the hybrid an interpretation that is correct. So he must have been wrong or lying.
Personly I don't see us (Mythos Humans) recreating the battlestar shape (not untill finding either remnants of the 12 colonies or possibly a wreck of a Battlestar) As for the probable surviviors on the other 11 colonies. Would the genepool be viable enough (with megatonnes of nuclear waste in the atmosphere's and a very small population) to repopulate the planets. Adama said that (our) Earth has more life than the whole of the 12 colonies combined.... I personally Don't think there would be any surviviors.... Unless the Centurians decided to make amends for the "skin jobs" Sins..... I dunno this requires a lot of thought.
Somehow the thirteenth tribe of Cylons created centurions with a very similar design to the centurions made by the twelve colonies two thousand years later. Maybe "god" caused it to be so, and will make our descendants build the same basic design. He evidently made humans and dogs and who knows what else to evolve independently on at least two planets.
Gah, Olmos threatened to walk off the set if there were aliens, but having a
literal Deus ex machina is just fine?
I prefer to think that the whole thing is a VR recreation, with the humans just sophisticated AI's. "God" is the master control program, or maybe a real person running the show. That makes much more sense than what we saw in the last season.
Don't forget that there were basestars that didn't die with the Colony. Cavil's Cylons are still out there too. They probably went back to Caprica, since they had already started to rebuild there, to research either resurrection or reproduction. If nothing else they should have been able to just clone new generations. Maybe, as the last clones died, the centurions might have been freed.