User blog comment:Cpt. Jack/Black pearl crew survived?/@comment-1771352-20110523201612/@comment-3158240-20110524030914

Well, I know that the actor who portrayed Raggeti said he did not want to come back for family reasons and so. http://www.digitalspy.com/movies/news/a201805/mackenzie-crook-not-joining-pirates-4.html

I don't know about the others, but why not? Maybe Disney, along with the writers planned that. Maybe in the 5th one it will be revealed.