Copyright

James Cameron wins Avatar copyright case

               In this case James Cameron was took to court by Elijah Schkeiban. Elijah tried to say that James took his ideas from one of his stories. James's lawyers had successfully argued that it is not possible to copyright such elements as a 'weak hero' and a plot twist in which the 'bad guys attack the good guys.' So James Cameron obviously won the case. 
                      http://www.thewrap.com/movies/article/avatar-copyright-case-dismissed-judge-56831