Even a ALIENS pinball from the Sigourney Weaver movie series would be cool. A big ALIEN head comes out of the playfield and grabs the ball - that would be cool. 
Useless trivia - Bram Stoker's Dracula by Williams in 1992 was originally going to be Alien 3 but the movie studio wouldn't approve the artwork.
.. and Bally already used the Alien on Space Invaders !
