Somebody figures that they can make one more really cheap movie.  There should be enough die-hard fans to turn a profit.  But the key is, the investment in the movie has to be really small.  Jaws 1,2,3,4 is a perfect example of this series of events.  Jaws 4 was so bad it was laughable.  The shark follows the family to Florida?  Is this a comedy?  What began as a real work of art (the original) finally fizzled and faded away with Jaws 4.  It’s a shame that this movie even has “Jaws” in the title.