Of course the big "IF" it's Johnny's schedule. Because this project it's for Disney, but Disney obviously have their priorities on "Alice 2" and "Pirates 5". so the question is "when"
But Deadline have good news about the develop of the script at least!
"I’m told that the script by D.V. DiVicentis is in strong shape. Of course, much of this depends on the availability of Depp, who’s playing Whitey Bulger in Black Mass right now, and is supposed to make another Pirates Of The Caribbean movie either later this year of early next. Sometimes these developments work out for everyone."