User blog comment:Staw-p/So what kind of Island will Luffy Destroy ?/@comment-3119203-20111226024158

He may already have. Figuratively. He might have destroyed the old way of life on Fishman Island, or taken out the prejudice between the two species on that island. It sounds cheesy, but I believe Hody Jones said that he had destroyed Fishman Island when he "defeated" the princes and the king. So, like LPK said, we simply have to wait and see........