Reviewed by GREG KING Director: Darren Aronofsky Stars: natalie Portman, Winona Ryder, Vincent Cassel, Barbara Hershey, Mila Kunis. Numerous films have dealt with the pressures and rivalries within the high pressure world of ballet where personal lives often take second place - Michael Powell’s 1948 classic The Red Shoes, Robert Altman’s The Company and Herbert Ross’s melodramatic Turning Point, etc. Set …