According to source here, Deadpool has been denied a release in China (the world's second-largest movie market) due to its violence, nudity, and language. Typically, Chinese censors work with Hollywood Studios to remove and amend content and come to an agreement, but in the case of Deadpool the offending material made up so much of the film's fabric that it would have been impossible to edit it out.
Last year China almost single-handedly turned Terminator: Genisys into a moderate hit, and the year before that it added $300 million to the global box office purse of Transformers: Age of Extinction. Superhero movies tend to do well in China too, with recent hits such as Avengers: Age of Ultron, Ant-Man, and Guardians of the Galaxy all posting big numbers.
The movie doesn't make a decent amount of money when it's released next month, it could mean studios would hesitate making other R rated superhero projects.
Ryan Reynolds starrer will hit the UK screens on February 4, 2016 and later USA screens on February 12, 2016