While I was venturing across the web, I noticed 2 videos from the official POTCO Youtube that intrigued me...though I'm not sure if these have been discovered already. But by the look of the date, they're relatively new(they were uploaded at the end of February).
The reason I'm revealing this is so that we can see two of many old friends we had aboard the Black Pearl that we sorely missed in On Stranger Tides. You'll see who once you watch 'em. ;)