Ok, um...Chiki, that's a good start. I guess I wasn't more clear...
I wasn't looking for Why it all happens but HOW it all happens. So for example:
1. Why do they kiss?
Will and Elizabeth kiss in the middle of the battle because as they have been fighting they are beginning to realize that they do not really belong together, but they want to be certain of their choice, so they kiss to see how they react.
2. When does Will propose and how would it end up Elizabeth does not say yes?
Will proposes right after the kiss, just to be sure that Elizabeth does not want to still marry him. He is honorable enough that he would marry her even if he no longer feels like he could love her, but he'll be relieved if she says no.
However, before she can say no, they are distracted in battle. Elizabeth gets knocked over, and even though they are no longer engaged, Will still cares about her and is distracted in the battle.
3)Will ends up stabbing the heart. How and why?
When Will is distracted by Elizabeth being knocked over, his opponents take advantage of the moment and stab him fatally in the chest. Will drops to the deck, and Jack sees this happen, as does Elizabeth.
Jack knows that the only way Will could survive such a blow is for Will to stab the heart, so he throws the chest down to Liz, who grabs it when it falls to the deck. She races over to Will and opens the chest for him, and convinces him that he needs to stab the heart in order to live, because she can't bear to lose him even if they are no longer "in love".
4. Why does Elizabeth end up alone for a while, and what is she supposed to be watching over?
Elizabeth decides she's had enough of pirating, but she knows she can no longer go back to her old life. Jack takes her and settles down with her on a deserted island. Occassionally, when the old bug bites them, they go sailing and meet up with Will to swap stories and to hang out.
Elizabeth is waiting on the beach for Will's first visit to land since he became captain of the Dutchman. He's going to meet Elizabeth and Jack's son, whom he's never met, because Gibbs watches over him when Jack and Liz go sailing.
5. What causes Jack to decide that yes, he wants Elizabeth even though she killed him and kissed Will again?
Jack understands how it is to be torn between two things that you love, and he comforts Elizabeth after she and Will have to say good-bye for the final time after the big battle.
She tries to tell Jack that she doesn't think things could work out between them, Jack gently chides her, and makes her think things over during the voyage to Tortuga. At Tortuga, Elizabeth comes to Jack and tells him that she may love him, but she doesn't know if she wants to be a pirate anymore.
Jack is quiet, then tells her that she doesn't need to be a pirate, that he knows a quiet place they can go and relax. So that's how they get to the island. 😄
So now, does anyone else want to take a crack at it? I know mine was fairly lame...