User blog comment:J Fan/Bruckheimer Talks PIRATES 5 mid-2014 update/@comment-996391-20140703122942/@comment-1984959-20140703235044

Or some sort of supernatural creature not usually thought as monsters.
 * Possible, but doubtful given Bruckheimer's recent comments. But the film isn't in production yet, so who knows?

If I remember correctly, I remember reading articles from movie websites, saying that there will be Ghosts and Witches in Pirates 5.
 * It was rumored, but who knows if that's what they're going with or if it was an earlier draft. Also consider the fact that they've been in several rewrites for the last few years, so the truth behind the actual plot may be fuddled (for now, anyway).

Also, About what it says in the article about Jerry Bruckheimer saying that, Pirates 5 hopefully starting to film in beginning of the year if I am not mistaken that would mean January 2015.
 * Can't deny it's possible, but following Bruckheimer's comments, it could be at any point in 2015. Even if it was the plan for now, anyone following P5 news know that plans can change. We'll have to wait and see.