Not to mention, Capo my boy, that one bad film does not undo a master filmmaker's career.
I mean lets say that THE DEPARTED is dreck, and who knows, it is possible.
Scorsese would still be a recognized master for his long career of really good and great movies: TAXI DRIVER, RAGING BULL, GOODFELLAS, CASINO, MEAN STREETS, KING OF COMEDY, LAST TEMPTATION OF CHRIST, CAPE FEAR, and so much more.
Most folks at BB.Net know that I haven't exactly cared for most of Steven Spielberg's recent output, but hes still gets my respect for when, to quote Vince Vaughn in a certain movie I reviewed quite recently, he was "money"...back when he made JAWS, CLOSE ENCOUNTERS OF THE THIRD KIND, the INDIANA JONES trilogy, EMPIRE OF THE SUN, etc....and especially maybe and arguably the best movie of the 1990s, SCHINDLER'S LIST.