Still predicted to be Pirates of the Caribbean: World's End, the good people over at JimHill have posted what they claim to be the official synopsis/plot for the film.
Summer 2007 will be action packed as the third installment from the "Pirates of the Caribbean" franchise comes ashore. As the age of piracy comes to a close, Captain Jack Sparrow (Johnny Depp), Will Turner (Orlando Bloom) and Elizabeth Swann (Keira Knightley) must sail off the edge of the map, navigate treachery and betrayal, and make their final alliances for one last decisive battle. Our heroes must face Lord Cutler Beckett (Tom Hollander), *********** and Admiral James Norrington (Jack Davenport) in a titanic showdown that could eliminate the freedom-loving pirates from the seven seas -- forever.
Notice the '*' symbol? Well, there is a name included in this list that is so SPOILERIFIC that you might just throw up if you read it. Not only does it give away a nice piece of information for Pirates 3, but it could have an effect on Dead Man's Chest as well.