The trailer for Pirates of the Caribbean: At World’s End (Disney, 5.25) does make the film seem like it might be a pretty agreeable serving of horseshit eye-candy. Question is, how long will it be? I wouldn’t have disliked the second one if it had been, say, 20 or 30 minutes shorter. A jape should never be lengthy. It should run 100 or 110 minutes, tops.