The official teaser of Rajinikanth starrer 'Kaala' has been released. The film also stars Nana Patekar, who will reportedly play the antagonist in the film, Huma Qureshi and Eswari Rao among others. Directed by Pa Ranjith and produced by Rajinikanth's son-in-law Dhanush, 'Kaala' is scheduled to release on April 27.