Srivastava was a former aide of mafia don Dawood Ibrahim.
"This is my second film and considering 'Khiladi 786' did well so there are lots of expectations from me. So I am in no hurry to finalise things. The film is of different stature. It is not easy to handle a subject of this nature. One has to stick to realism and keep it entertaining at the same time. This time it is difficult," Ashish told PTI.
"I am still writing the script. I think it would take couple of months may be five-six months to finish the scripting part. I want to do full justice to this film, so I would take my own time," he said.
The film will chronicle the life of Srivastava on the big screen. "It is a semi-biopic is what I would say. The film would probably have 100 percent or 80 percent or 40 percent of Babloo's real life story. Since its a film so we will have to make it larger than life," Ashish said.
'Khiladi 786', starring Akshay Kumar and Asin did good business at the box office. And now with the gangster flick, Ashish is deliberately moving towards serious stuff.
"As a director I don't want to stick to a particular genre. I want to try out different things. It was a conscious decision to do a serious film after a comedy. Like Yash Chopra not only made romantic films but action and drama as well. I also want to do make different kind of films and offer audience a variety," Ashish said.
Interestingly, Srivastava has a wishlist of actors - who he thinks would be best to portray his life on screen.
"Babloo feels Abhishek Bachchan and Emraan Hashmi would be the best one to portray him on screen. But we haven't met any of the actors yet. Casting would depend on script," the filmmaker said. (MORE)