The Sun God Nika existed in the first world, confirmed by Oda in One Piece Chapter 1144. The First World was around 3000 years ago, where Nika was born and died in a war.

Fake deities became the talk of the town with the entry of One Piece's fake Sun God on Elbaf, and, unsurprisingly, the fandom has a lot of characters in their mind regarding this title.