Mara tells EW that she was supportive of the infamous nipple poster: “I understand why there was a lot of controversy. People have a hard time with strong females and with nudity. But I think had I been doing something incredibly violent on the poster, people wouldn’t have had a problem with it. That sort of says a lot about the world that we live in. It’s just a teaser poster. I think it did just that. It teased people.”
It's hard to take a definitive stance on a) strong women, b) nudity and 3) violence--especially when all three are combined in a movie you are trying to promote--so we'll interpret Mara's statement as a deflection of issues that will certainly rise again once the film opens.