Resurrection?
If Calypso truly was loyal to Davy Jones, might be possible she may come back briefly in human form to resurrect him. Look at Barbossa.
But then again, Will wouldn't be in the blacksmithing place on Port Royal. and Elizabeth's been talking about her father at some points. Alas, im afraid the only way to figure all these puzzles out is if the story of POTCO Progresses.. Whenever that will happen..
that or we can solve this puzzle.. The pieces are tiny, but the puzzle will be compleated eventually.. and what does Tia Delma's words mean: "From the darkness comes the light"? Will we have to eventually join sides: Jolly Roger or Beckett? Where oh where could those puzzle pieces be..