The trailer of actor Siddharth’s upcoming horror film Aval was unveiled on Monday. The trailer promises a bold and uncompromising horror-thriller that we all have been waiting for a long time.Horror-comedy is the latest fad in the South Indian film industry. In fact, it has been the favourite of the south filmmakers for the last few years now as the films from this genre mostly become successful at the box office. However, a full-length, terror-inducing horror thriller was long overdue. And Aval promises to fill that void.