We know Law found a Poneglyph in the basement of Onigashima, and that there were multiple poneglyphs in whole cake island; however we aren’t told what they’re saying all we know is:
1. Oharas Poneglyph - Hinted at the existence of a Great War and even gave hint to the name of the Ancient Kingdom (now under the sea)
2. Skypeia/Jaya Poneglyph - Hinted the location of Poseidon
3. Alabasta Poneglyph - Hinted the location of Pluton
4. Fishman Island Poneglyph - Hinted about Joyboys past with Fishman Island and his promise
However, Big Mom and Kaido had a deal to find all the ancient weapons and conquer the world with them. Kaido very likely knew of Pluton, and that’s the reason he settled in Wano. With the shogun having this knowledge, it’s possible Orochi and the hag found this out and used it when recruiting Kaido. We know Caribou knew of Poseidon, and likely sold that information to Kaido when he was captured.
However that still leaves uranus. Since Crocodile knew that the Alabasta Poneglyph was supposed to hold the secret to pluton, do you think Big Mom or Kaido knew one of their poneglyphs knew the secret to Ouranus?
1. Oharas Poneglyph - Hinted at the existence of a Great War and even gave hint to the name of the Ancient Kingdom (now under the sea)
2. Skypeia/Jaya Poneglyph - Hinted the location of Poseidon
3. Alabasta Poneglyph - Hinted the location of Pluton
4. Fishman Island Poneglyph - Hinted about Joyboys past with Fishman Island and his promise
However, Big Mom and Kaido had a deal to find all the ancient weapons and conquer the world with them. Kaido very likely knew of Pluton, and that’s the reason he settled in Wano. With the shogun having this knowledge, it’s possible Orochi and the hag found this out and used it when recruiting Kaido. We know Caribou knew of Poseidon, and likely sold that information to Kaido when he was captured.
However that still leaves uranus. Since Crocodile knew that the Alabasta Poneglyph was supposed to hold the secret to pluton, do you think Big Mom or Kaido knew one of their poneglyphs knew the secret to Ouranus?
