http://www.eurogamer.net/articles/2013-03-12-ken-levine-personally-killed-off-the-bioshock-film-heres-why
"The studio then got cold feet about making an R rated $200 million film, and they said what if it was a $80 million film - and Gore didn't want to make a $80 million film. They brought another director in, and I didn't really see the match there - and 2K's one of these companies that puts a lot of creative trust in people. So they said if you want to kill it, kill it. And I killed it."