User blog comment:J Fan/Pirates 5 - Sequel News Rundown (Revised)/@comment-1984959-20140318235210

Mainly covered the latest on P5 via this blog, but it isn't much. According to sources, Variety's Marc Graser tweeted:
 * Disney's Bob Iger says that the fifth Pirates of the Caribbean film has not yet been given the greenlight.

As noted by CinemaBlend and JoBlo, this has cast doubt in the film even happening. But even then, and it pains me to speak for either cases, that nothing is set in stone.