Greater Celestia Theory + how might genshin continue after we resolve things in Teyvat

Venessa's Ascenscion to Celestia, Genshin Manga

I think Venessa's ascenscion depicted in the Manga (plus Venti's voiceline) set a lore precedent that celestia (not to be confused with the individual God Phanes/HP) is really a tangible location that could be inhabited by other entities (gods, angels, etc.) around the level or higher than the archons. Perhaps there are more entities than just the four shades and that the strict hierarchy or bureaucracy simply delegates or authorises a specific body or faction to actually interact with Teyvat (more specifically, the angels before they regressed into seelies) while the other Gods that answer to phanes are strictly confined within the structure, perhaps in order to maintain the firmament (Celestia uses technology, which implies the need for "engineers" or "technicians").

This leads me to also speculate the possibility that Phanes is not THE primordial entity but ONE of the primordial entities in the Hoyoverse? What if his kind or organisation is an interplanetary one with the aim of helping civillisations fight against the overarching threat which is the abyss. The abyss as a galactic threat has already been implied with the Hexenzirkel's constant border maintenance as well as Skirk's home planet. So what if celestia is just ONE of the many "colonial" outposts of Phanes' species/organisation. Specifically, there are other celestias (floating islands) attached to other planets with the same anti-abyss technology like the nails.

So maybe, after we solve Teyvat's issues, maybe this isn't the end of HP or Phanes. We are simply dismantling one of "Greater Celestia's" outposts.