Hmm, the search of eternal youth by Jack Sparrow in company of Elizabeth?
Its too much, since she is married... and everything indicates that his relations failed. And Will is traveling round the whole ocean from here for there taking the souls ... Some more the plot line got lost (thanks to writers). Without of any personages either be Jack, Elizabeth or Will it will be another movie. The problem is that the scriptwriters have fallen down in their own pitfall - The history has stretched too much - it is really complicated to re-live through the success of the first parts.
... and I do not believe that they will find slightly any more of topic of the pirates to hook the public, perhaps ... extraterrestrial or terrorist? ops.