Guh, I can't begin to say how much I loved this.
I watched PoTC for the first time last night(*beats self for utter lameness*) and the island scene just screamed "JACK/LIZ, OVER HERE!!!" Oh, and Jack's little line about it not being able to work out between them as he leaps off. Though that was more amusing than serious.

Anyways, I've been digging through the fanfiction and I must admit, I like your evidence for them. It really could work- if only we could find a way to distract Will...