You kind of have to feel bad these days for David Fincher fanatics who genuflect at the brutal, testosterone-fueled altars of Seven and Fight Club and, to a lesser degree, Zodiac. They finally get their first new Fincher feature since 2014's Gone Girl, and it turns out that in order to even slightly enjoy the director's Mank (which premiered on Netflix this past Friday), they're required to have a pretty healthy working knowledge of Citizen Kane.