Hmm....Will and Liz's future... I always assumed Elizabeth would still be Pirate King and Pirate Lord of Singapore. If the curse is broken, Elizabeth will still be pirating and handling political issues for the pirates.
I see her getting into smuggling. Still exciting, but perhaps a bit easier and safer for her while she has young Will.
When Will's curse is broken, he is introduced to his young son, and they all have to get used to living with each other again. Will snores; Elizabeth hogs the bed, etc.
Will starts up his blacksmithing and things are nice and normal for about six weeks, and then young Will, in a fit of curiosity, happens to stumble across (and steal) an object belonging to one of the local gods, and so begins another adventure.
If the curse doesn't break; Elizabeth goes in search of Jack and Barbossa, who are taking turns being captain of the Pearl, and suggests that they all go look for the fountain of youth. So after much arguing, they do.
Elizabeth drinks from the water, and is now immortal. She hooks up with Will on occassion, sneaking into the Land of the Dead for various reasons, and he sneaks to the Land of the Living whenever he can. They begin working out some business plans, and by the time the 20th Century rolls around they own Pepsi, Limited Brands, Verizon and Starbucks.
The Flying Dutchman was replaced by a yacht recently, and the kids' daycare plays "Little Einstein" to keep the children who die at sea occupied.
Things are a lot quieter for Will now, and Calypso finally releases Will from his duty. As a gift, she allows Will to remain immortal to be with Elizabeth. The two of them settle in to life in one of their many mansions (by the seaside), but one of their great-great-great grandkids turns out to be none other than a vampire slayer, and they get caught up in her adventures....
Ok, so it's a bit tongue in cheek. I don't know why people insist on making Elizabeth Domestic Goddess and Queen of Home and Hearth, because she obviously is neither. 😛