one piece ending

in the end of one piece, we will know that the marines were really the bad dudes, based on the bombardment of ohara (right? the hometown of robin?), they don't want the world to know of something. the void history will revolve in this concept, following the creation of devil fruits and the super weapons. one piece i believe will not be treasures and gold, it should be something deeper in sense. if not, then i believe that the beauty of one piece creation will be spoiled.