User blog comment:BellatrixTheMagicalPotato/One Piece Theory:- The Ancient Weapon Uranus/@comment-1595565-20151113181514

You fail to look at their mythologies. Poseidon is a sea god, ie Shirahoshi can command stuff from the water. Pluton is a war ship that can wipe out whole countries, ie land-based destruction. Uranus is the sky god, meaning the third weapon is more than likely something that can fly, which last I checked, trees can't do. You also make the dangerous assumption that Devil Fruits all come from the same tree when we know next to nothing about their horticulture. Good try, though.