A rule first postulated by known film director George Lucas, stating that, "In any given movie franchise, at least one third of the films will
suck." In addition to his own Star Wars prequels, some examples of movie sagas that follow this rule are: the
Matrix saga, The Godfather trilogy, The Planet of the Apes, Shrek.
An exception to the rule is Toy Story, while the ultimate application of the rule is the Twilight Saga, wherein all the movies
suck, the novels sucked, and
yet there's another movie in the making.
Son: Dad, do you want to watch the Phantom Menace?
John: There were no prequels, and I have no son.
Paul: Should we watch Godfather Part II?
Sam: Does George Lucas's first rule of cinematography apply to it?
Paul: On the contrary, it's the
best in the series!