From Cinelinx:
Disney has been having a rough time of getting the fifth movie in the successful Pirates of the Caribbean franchise up and running. It was initially set for a Summer 2015 release date, but then received an indefinite delay. Disney wasn't happy with the script at that point and wouldn't even give the film the greenlight. While there's been much discussion about it and thoughts from the franchise producer Jerry Bruckheimer, not much has been happening on Pirates 5...until now. Disney has set a brand new release date for the film, but we won't see it until 2017.
Hopefully they use this long delay to make a really good film. That's all I want.