Fun with Maths! - "For the Fans"

OK, I don't want to keep going on about Batman v. Superman on here, I didn't even hate the movie really, there were bits I liked, but there's something I do want to tackle in regards to some of the response.  As I have previously said, if you liked the film, fine, that's your opinion, and I have mine, just because we don't agree on this, as it is art, one opinion doesn't really trump another.  So as such, this is against all those who are rabidly manning all the battle stations to defend the film.  One defence I've heard of this film, and indeed this is something that I have heard time and again when something with this devoted a fanbase doesn't quite work out, is that it's being made "for the fans".  This is something that turns up a lot in tweets at some critics, even if said critics are pretty publicly comics fans.  Right, time to use some good old fashioned maths to help prove why this argument is terrible, especially in this particular case...