User blog comment:J Fan/Dead Men Tell No Tales production officially wraps!/@comment-1140008-20150820000213/@comment-1984959-20150820110126

Any idea as far as official reasons...none whatsoever.

You could be right that it does have a lot of special effects. There were a couple of shots with Javier Bardem in make-up mixed with CGI-ish stuff, so Captain Salazar and his ghost crew could be a factor. Then again, one could also point to the numerous blue/green screens seen on set (I believe there were shots with the Pearl and the QAR) What they are, I don't have an answer, other than it could be anything. One thing I have said before, and I will again, I wouldn't be surprised if someone turns up and says that P5 is doing reshoots. Because as you say, two years is a long time, mate. Until then, I probably have to assume it's the special effects, as I don't think Rønning and Sandberg dealt with that much CGI in their past movies...could be wrong, though.