'Kalki 2898 AD', which hit the theatres worldwide on June 27, is currently minting moolah at the box office. The sci-fi thriller which is a blend of the Hindu epic 'Mahabharata' and science, received positive reviews from critics and audiences. Nag Ashwin, director and writer of 'Kalki' is ecstatic about the film’s success at the box office. Starring Prabhas, Amitabh Bachchan, Deepika Padukone and Kamal Haasan, 'Kalki' has grossed over Rs 700 crore within a week of its release at the global box office. In an interview, Ashwin has opened up about the film’s second part.