Obviously the Nika being the gomu gomu no mi thing is a retcon but Sun worship has been a prevalent theme throughout the story especially in nations which are tied to JoyBoy (Shandia, Elbaf, Buccaneers). Mother Caramel mentions the Sun God of Elbaf, Shandia worships the Sun God, Kuma’s bible has Sun imagery. You could even add the Sunlight tree eve from Fishmen Island if you’re really want to stretch.