POTCO 4.. what would your story plot be?

[Captain]

they announced a 4th one already and it is scheduled for 2011 or 2012
not a big deal for them to make a new one
alledgedly it's going to certer around jack and barbossa looking for the fountain of youth
elizabeth wont be in it because keira knightley already said no
and will might be in it. that would make sense, cause he's out on the sea and elizabeth is just home being pregnant at the time the story would take place.