Since the appearance of ancient weapons in The Arabistan chapter, the three ancient weapons have always been a hot topic for sea fans, as of now, the only thing that really appears in the three weapons is "Aquaman, Poseidon", so the remaining two ancient weapons, their whereabouts have long been hinted at in the play? It's just that we may not have found out.

Poseidon has always been the secret weapon of the Fishman Island, and it is important to know that the Neptune are the strongest creatures in the sea, so being able to control them is equivalent to having the ability to destroy the world. At present, the owner of this ability is the Fishman Princess who is very good friends with Luffy on the Fishman Island, White Star.
But do you know that Poseidon the Sea King does not appear regularly, it is not that every hundred years there will be a mermaid princess with this ability, but a guide is needed to guide the fish people to glory, of course, if you have a bad heart, it is possible to use poseidon the sea king to destroy the world, the current mermaid princess White Star's guide should be our protagonist Luffy, after all, when the two separated, Luffy promised to lead her to meet the forest on land.
From the current point of view, Poseidon, the sea king, has become Luffy's power, and will certainly be able to play a very crucial role after that, so where are the remaining kings and Pluto kings?
According to the plot of the Straw Hats in the Water Capital, we learn that Pluto is a huge warship, but also has the power to destroy the world, it is said that a single shell is enough to destroy an island, and Robin already knows the whereabouts of Hades in Arabistan, but she does not choose to tell Klockdahl, and she should be the only one who knows the whereabouts at present.
Although we don't know where Pluto is, we do know where Pluto's blueprints are, and Pluto's blueprints have actually been in the water capital, and are kept by French, because he hid the blueprints in his body, so cp9 can't be found anyway. However, in order to save Robin on the Island of Justice, French resolutely burned the blueprint, although we do not know whether he is really stupid or fake stupid, but at least one thing is certain, that is, French must have seen the Pluto design.
So in fact, where the Pluto King is is no longer important, French has seen the design of the Pluto King, so when it designed the Wanli Sunshine, it must have also referred to the design drawing of the Pluto King, plus French is so confident in it, so even if the Wanli Sunshine is regarded as a new generation of Pluto, it seems that there is nothing that cannot be said.
Aquaman and Pluto have appeared more or less, but only the King of Heaven has no information, and although we have never found any information about the King of Heaven in the anime or manga, we seem to have found some clues in the prequel to the world of the mighty.
The prequel to The World of Mighty, which tells the story of the golden lion and Roger's era, including the naval battle between the golden lion and Roger, but the message of the king takes place in the naval battle between the golden lion and Roger.
The naval battle between the two is called the Battle of Aitwall, the dream of the Golden Lion is to rule the world, although he already has a huge army, but he lacks a very powerful weapon, through their dialogue we learn that Roger knows where the weapons that can destroy the world are, so the Golden Lion wants to cooperate with Roger.
Attentive friends have discovered that there is a pink egg on Roger's pirate ship, although we don't know whether the king is a creature or a dead thing, but the giant egg on Roger's ship is really strange, and it is likely that it is the king of heaven, that is, the weapon that destroys the world as the golden lion says.
The King may have been in the hands of One Piece Roger, but Roger did not do anything with it, of course, do not rule out other possibilities, before we know too little about the King, do you think the dome on Roger's ship is the King of Heaven?