Martin Scorsese has famously collaborated with Robert De Niro in eight films. Scorsese has said that his creative collaboration with De Niro is very deep and that they can often understand each other without even talking. Their collaboration has had many dry spells (including recently), but Scorsese says he shows almost every script he writes or considers directing to De Niro to see what the actor's thoughts on them are even when De Niro ultimately has no involvement in the film.
Of the three films he has been trying to make since the mid-1970s, he has done two: The Last Temptation of Christ (1988) and Gangs of New York (2002). The third film, a biopic of Dean Martin called "Dino", has been on hiatus at Warner Brothers since the late 1990s. Scorsese has a very specific all A-list cast in mind, probably why this has yet to be produced. He wants Tom Hanks to star as Martin, Jim Carrey to play Jerry Lewis, John Travolta to play Frank Sinatra, Hugh Grant to play Peter Lawford, and Adam Sandler to play Joey Bishop.
As a teenager in the Bronx, Scorsese frequently rented Michael Powell's The Tales of Hoffmann (1951) from a store that only had one copy of the reels. When this was not available the owner told him, "that Romero kid has it", referring to George A. Romero who was also a huge fan of the film. Today, both directors cite the film as a major influence.