User blog comment:HephaestusThePrivateer/My Ideas For Pirates 5/@comment-5120604-20120220130338/@comment-4898132-20120220131540

Personally, I don't even know where the name came from...that's what interests me. But the way I see it, this won't be the title. Previous movie titles were released by Disney. DMC was released by Disney, AWE was revealed by Terry Rossio in the DMC Audio Commentary(yea, I was nerdy enough to listen lol).

And OST was the big interesting case(as I noted in the film's article):
 * Both fans and critics thought that the supposed fourth film would be titled "The Fountain of Youth", though that was because that's all we knew about the fourth film(even I believed it so). It wasn't until the surprise announcement by Captain Jack himself that it was titled "On Stranger Tides" and the fact that the book of the same name was used in some way.

Main point: Any titles made without any real person involved in Pirates confirming it(Bruckheimer, Rossio, or some important Disney exec)...it's false and pure speculation. Again, just saying.