The only thing I am seeing in the Zelda Wiki, is Zelda being listed as a descendant (which the story basically hands to us) and Zelda listed as ancestress, with a reference to Hyrule Historia page 77. I think someone wanting to push the theory that Rauru's reign took place between SS and MC is trying to sneak the ancestress bit through as though it were confirmed fact. If there was something to back up the claim, they would have linked to something stronger than a page that talks about the founding of Hyrule, that was not only written before Sonia was a conceived character, but also doesn't even mention Zelda's name.
Gods can't die, Hylia couldn't have died "naturally," only after becoming Zelda could she die.
I can almost guarantee we will never hear the word "Zonai" in the Zelda series again.
All we know is that Sonia is a priestess by birth; if the kingdom of Hyrule was founded after Skyward Sword like the books say, and Rauru and Sonia were the first kings of Hyrule, it's almost confirmed that Sonia is SS Zelda's descendants. If the books or Rauru is wrong, however, this isn't confirmed.
I think this would be just as bad. Just like the Oocca, Minish, Yeti, and all of the other intelligent, seemingly important, races simply walking backwards into the bushes.
It's the Zelda way. In ten years we're going to see a bunch of discussion wondering if the Blimkin species from Balloons of Eternity is actually the Zonai after they shapeshift into a bunch of penguins.
While other races become main stay, and references of them can even be found in games they don't appear. We've see references to a mysterious, highly advanced, sky people for ages. It would be nice to see that flag finally get planted, going further.
I'll believe that when I see it.
I would personally like that, but I doubt it. I think, based on the build up around the Ancient Hero, his game is more likely. At this point, though, it's too early to tell what direction they will finally settle on.
