Original theory can be found here
And while I'm at it, I'm going to post the entire stuff:
We all know that coverstories are pretty much important to the story. Every characters who got his own coverstory came back to the story with differents purpose. Buggy, Ace, Mr2, Crocodile, Mr3, Jango, Hachi, Coby, Helmeppo. Some of them have yet to make their come back, but it's a matter of time.
Now about Gedatsu. What could he do? Why such a random character got his own coverstory? Its been a while now, yet nothing happened? Seems weird to me.
You all know about Pluton. Crocodile knew that Pluton was located in Alabasta (how the hell he knows is still a mystery), and according to Cobra and Robin, it is safe to assume that Pluton is indeed located in Alabasta.
! [qimg]http://arc.batoto.net/comics/2011/05/03/o/read4dc0831e39fe8/One Piece - 218 - 03.jpg[/qimg]
So… where the hell is Pluton? An huge warship...that is not found since about 900 years??
According to Robin, ancient weapon's names share the names of Gods.
Poseidon= god of the sea
Uranis= god of the sky
Pluton (or Hades) = god of the undergroundWell, yea. Underground. That's the key word.
Where should we look for? underground in One Piece?
! [qimg]http://images3.wikia.nocookie.net/__cb20130121101348/onepiece/images/d/dc/Chapter_331.png[/qimg]
Hell yea. Gedatsu's coverstory. And now, what's going on in this story? Well you know it:
! [qimg]http://images4.wikia.nocookie.net/__cb20130121101350/onepiece/images/2/2d/Chapter_338.png[/qimg]
! [qimg]http://images2.wikia.nocookie.net/__cb20130121101438/onepiece/images/b/bc/Chapter_342.png[/qimg]
! [qimg]http://images4.wikia.nocookie.net/__cb20130121101438/onepiece/images/5/55/Chapter_343.png[/qimg]
Alabasta.
In short, Pluton as a name is related to the underground. Underground in One Piece can be found in Gedatsu's coverstory and this coverstory is related to Alabasta where Pluton should be located.So my theory is this: I think that Gedatsu will accidentaly discover Pluton while digging in the underground of Alabasta. Which mean, I think that Pluton is hidden in the underground.
I'm not saying that Gedatsu will own Pluton, obviously. Lof of stuff can happen from the moment Pluton is discovered and known around the world.
You have the nerve to call the Half-Moon Theory stupid, but you think that Gedatsu will find Pluton?