User blog comment:J Fan/Dead Men Tell No Tales - Details: Story, Characters and Setting/@comment-12320611-20150516101800/@comment-25426315-20150516121249

Barbossa and Salazar are definitely collaborating, (Geoffrey Rush said that he could play the villain again), but we don't know the reason that Barbossa would collaborate with someone who wants to vanish pirates, and first of all, captain Jack.

And we don't know the way that Salazar escaped the Triangle, so I have a little weird theory. Maybe Barbossa brought him back, with the powers of Blackbeard's sword, (who knows why?) and, since we have seen Queen Anne's Revenge in only one scene, maybe the ship sinks, and that's why Barbossa teams up with him. (JUST A THEORY.)

The truth is that the whole thing has gone really weird and different, since the screenwritters are not the same, anymore, so Jeff Nathanson doesn't completely "know" the characters. I mean, at the end of P5, we saw Barbossa turning into a pirate again, and now, they keep shifting him?