more info, with conflicting information about who Davy Jones fell in love with. Taken from another board so who knows:
1) World's End is in a sense a purgatory for people who are still being judged whether or not to go to heaven. World's End is literally a waterfall going off the 'edge of the world', and below the waterfall is kind of a desert paradise/oasis. There are giant crabs that chase Jack. The Black Pearl is also there with him, but it looks like it’s beyond restoration. At World's End are thousands of people, and each person has a note in their pocket that has what actions they're being judged on. Jack has many 'sins' against him, but also is noted for returning a cargo of African slaves back to their original homes in Africa (this information is actually proven in a Verizon cell phone V-cast mobile game; info can also be seen on this site under game
http://adisney.go.com/disneypictures/pirates/main.html )).
Grant "The Sea Sponge" Sparrow, is also looking for his son, Jack.
2) Will, Jack's crew, Elizabeth, Barbossa, and Tia Dalma are all sailing on a new ship. After many days of Will and Elizabeth not even speaking to each other, Elizabeth asks Will if he saw the kiss. She then explains her reasons behind it, but Will becomes bitter. Throughout the movie, he begins to ignore Elizabeth, and Tia Dalma says that the change that is in him is going to cost them at some point.
3) It turns out that Barbossa did die, but was miraculously rescued by Tia Dalma when his spirit requested her help at World's End. Tia Dalma then tells them that if they can make it to World's End's waterfall, they could possibly reach Jack.
3) Cutler Beckett now has Davy Jones' heart, and has control over him. He then demands to Davy Jones that he capture all pirates of the seas. There is a specific stress upon Davy's reluctance, reflecting the lengths to which he is willing to go to preserve his heart. Beckett also gains control over the Kraken, to further give power to the East India Trade Company. Norrington gains the position as admiral.
4) Will and the pirates have to sail east to the Pacific Islands to gain passageway to World's End. On their way, they run into Captain Sao Feng, who may possibly attempt to kidnap Tia Dalma based on interviews with Naomi Harris (
http://actionfilmscomedies.suite101....ibbean_3_news).
5) (The person who gave me this information was a bit weary about this part, so he told me to take it with a grain of salt): Jack then notices the ring that he stole from Tia Dalma's hut allows him to talk to the giant turtles that live around the waterfall. They vow to carry him back up the waterfall if he promises that they can get vengeance back on the Voudoun priestess Tia Dalma. They realize that he has one of Tia's rings, and are convinced that he can lead them to her.
6) Davy Jones comes aboard the pirate vessel Will is one (presumably, everyone is tied up). He’s about to have his crew kill them all because of Will stealing his key, but notices a locket Elizabeth has around her neck. He then asks her where she got it from, and she says from Tia Dalma's hut. Davy Jones is then surprised to know that she [Tia Dalma] is still alive, and rescues them only to find Captain Sao Feng's boat so Davy can meet with Tia once more.
7) Davy Jones ends up talking to Will a lot; finding out that Elizabeth is (supposedly) falling for another man. He tells Will that his own ex-lover fell in love with another pirate (Tia with Jack Sparrow). Will then grows closer to Jones, gaining an appearance of the sea himself as time goes by. Bootstrap Bill is upset with the way Will is turning out.
8) Captain Sao Feng has Tia tell him how to find Beckett's ship, as to kill him and get the heart of Davy Jones.
9) Davy Jones and Barbossa, apparently acquaintances (I’m not quite sure how), lead the crew closer towards World's End. Beckett then catches up with their ship, along with Captain Sao Feng's ship. There's an all-out fight between Davy Jones, Beckett, Sao Feng, and Norrington. As everyone is getting closer to the waterfall, Jack comes up the wall of water riding on the back of two giant sea turtles, much to everyone’s surprise. There is rumored to be a comedic line from Will at this point that Orlando is looking very forward to delivering. Amidst the fighting, Jack's crew and Elizabeth try and rescue him [Jack] from the dangerous waters. While Davy Jones is trying to get his heart back, Will prevents Jack's rescue. Will then gains access to Davy Jones' heart and stabs it with the knife his father gave him. Davy Jones also meets up with Tia, begging for her to return to him, but dies before her. Will then becomes completely changed, gaining a look similar to Davy Jones/the sea. He then kills Beckett, Norrington, and Sao Feng. Liz and the rest of Jack's crew fall into World's End.