Ali Abbaz Zafar's 'Sultan' is already in the news with Salman Khan playing the lead role of Sultan Ali Khan, the wrestler, in the film. After speculations over the female lead and the similarity of the film to 'Abhimaan', it seems Ali has a real surprise for his audience. A source close to the film said, “The female lead is a negative character- very, very challenging.” However, it “ won't be an out and out negative character for sure”. Meanwhile, the shooting for the movie has begun sans a leading lady.