Sound and Fury Over Nothing?

This may be funnier than the movie:  the estate of William Faulkner is suing Sony Pictures over Woody Allen's "unauthorized" use of the author's famous quote, “The past is never dead. It’s not even past.”  It's uttered--in an altered form, no less--by Owen Wilson in "Midnight in Paris."  The Wood man won an Oscar for the screenplay.   Now, will estates of Hemingway and Gertrude Stein sue over their portrayals?