A few months back I found some "maps" of aztec idols on this blog. Now I have found the actual models of them.
Each of the maps I found are on 1 of these statues. I suspect this aztec theme will be implicated in a future story quest. Perhaps the Evil Curse of Doom isn't the black spot, but perhaps its an aztec curse, put on the swords by Calypso, who made Davy Jones the captain of the Dutchman. Just some ideas of mine. I really can't see these images being implicated anywhere other than a new island that is specifically for a story quest.