Th truth is that we do not know and all we can do is speculate.
This is, of course, entirely obvious, so I don't know why you felt it necessary to point it out. Of course we're speculating. There are no real Baku or Son'a or anything; they were just imaginary entities created for a movie. So where's the harm in using our
imaginations to try to explore the possibilities and flesh out the ideas a little more?