Go to the "Extra Features" section and select the "Making-Of Documentary" feature. After the end of the documentary, a different Alien 3 trailer is shown including scenes not in the final cut of the movie.
Easter Egg Rating: 100 %
1 person has confirmed that this easter egg is valid, while no one has confirmed that this easter egg is invalid.
Go to the "Special Features" menu and select the "Making Of" documentary. After the documentary is over, a second "Alien 3" trailer starts that includes scenes that are not even in the final cut of the film.
This easter egg was generously submitted/corrected by DougieB