One Piece has recently shed quite a lot of light on the history of the world, and a lot of it is pertaining to the God Valley as well. This island was first introduced to the fans during the Wano arc and it was made very clear to the fans that it would be important in the story later on. Although fans wanted this part of the story to be explored earlier, now, they realize that Oda had a completely different plan in mind and it is safe to say that it is a fabulous one.