Who said We know Sun God?
Original Sun God is Nika,
Joy Boy didn't become Sun God himself, He instead ate DF that would allow him to do so,
And Luffy is the guy who Inherited Joy Boy's DF,
But for example, if you look at Blackbeard's Flag, you know that Asura does Exist in OPVerse,
And We've seen Zoro become One, was it thanks to a DF? No, He turned into Asura by himself,
So why can't the same apply to Sun God?
Or look at Shirahoshi, did She eat Poseidon DF? No. She is born to be the Next Poseidon,
Same for Usopp who is becoming Sogeking (King of Snipers) or Sanji who might become Sora ... etc
"True" Current Nika is the One who's gonna become Sun God the same way Nika Originally did ---> Without a DF.
So Overall, don't tell me Luffy is Sun God or Joy Boy is Sun God or whatever,
True Sun God Nika of this Era is the Guy who can turn into that Form "Without" a DF.
Secondly, Nika was probably called Sun God cuz He restored the Sun, hence why Elbaph celebrate Death & Rebirth of Sun,
Based on this, i believe that if Someone would be called Moon God, it's whoever Saved The Moon,
We've seen such Scene when The Moon was visible again thanks to Luffy vs Kaidou, which Saved Inu/Neko,
I believe that Scene + all other Sky Splitting Scenes were a Foreshadowing that Sun God has his own Equal who can be called Moon God,
Just like Roger & WB or Kaidou & Big Mom or as indicated by previous Color Spread Luffy & Zoro, or as indicated by Viver Card which called Beckman The Moon to Shanks Sun ... etc (Think of them like Calgara & Noland)
That means Moon God is Sun God's Equal & Rival Partner,
Which if you haven't noticed yet, explains why Giant Pirates prefer to have Two Leaders (Dorry/Brogy & Jorul/Jarul),
Even Hajrudin has his Name Inspired by someone who formed a Duo with his Brother Urouge,
Sun God imo is basically Momonosuke (Rightful Heir) of Sun Worshipping People,
Moon God is his Partner & also the guy who is supposed to be Momonosuke of Moon Worshipping People,
You think it's a coincidence that Enel stole Birka's Legendary DF, used it to Destroy Birka, ruined Urouge's Dream & said He wants to be Moon God, while on other Side, We have Loki who took Elbaph's Legendary DF, said He wants to Destroy Elbaph, and calls himself Sun God?
True Sun God of Current Era (Think of him as Momonosuke or Shirahoshi) is Hajrudin, Future King of All Giants.
While his Moon God, is gonna be Urouge, the Rightful Heir of Birka, and Future King of All Sky People.
