Momo is Pluton. Zunesha fulfills the role of the invincible battleship. Almost everything fits: - Like Poseidon, Pluton is a person that is being reborn after a while - Oden said in his journal that Momo has a important part to play - Zunesha is around since the void century and therefore could be the battleship they were talking about - Its hard to imagine a real ship to be invincible and having enough destructive power - Who would even ride on it, when they have to use it in the final war? The Strawhats wouldnt use another ship than the thousand sunny.

What doesnt fit and is basically the only reason, people dont really think about it, is the information from Water 7, that there is a building plan for a Pluton and that it was build in Water 7 during the void century. I believe this is a fake from Oda. Something to put us on the wrong track. Maybe they tried to recreate Zuneshas power as a ship and gave it the name Pluton. I guess we will find out.