Saw some speculation on r/OnePieceSpoilers that mentioned,
"Sea Kings know about the Void Century so people just have to ask them."
That made me realize, what if part of Blackbeard's plan is to get Pudding to brainwash Shirahoshi into asking the Sea Kings about the Void Century, then using that knowledge as blackmail against the World Government OR even just outright telling the whole world about it to screw Imu over and have them make him king out of gratitude?
It is a very One Piece-esque twist for the ravenous sea monsters to have been perfectly willing to tell the secrets everyone in and out of universe has been dying to know but haven't because people keep running away from them and nobody can understand their various growls and clicks.
I don't even think it's occurred to Shirahoshi yet that she has easy access to all of this forbidden knowledge since she's only just now starting to realize that she has a special connection with the sea kings.
Blackbeard wanting Poseidon for this purpose in addition to the destructive potential of having an army of sea kings at his beck and call lines up to. I actually think if anyone is going to hypnotize Shirahoshi, it will be Lafite because he's a hypnotist and has used those skills before to get the Blackbeard Pirates into Marineford. He'll probably do the same to Pudding too because she claims to have not awakened her third eye abilities yet, so maybe there's some kind of mental block there which Lafite will bypass by hypnotizing Pudding into unlocking her full potential.









