"On the contrary, I think that for a film like this which requires so much hard work and preparation, it has been finished quite fast", defends Emraan, "When you are depicting an era of the late 60s and early 70s, there is lot of time that has to be spent on activities that are required to be completed away from the sets. There is some effort that has gone into recreating the time period gone by. The film's screenplay was tough as well, since lot of minute details were required to be captured."
Elaborating on the nitty-gritty of making a film like Once Upon A Time In Mumbai, Emraan says, "We had to shoot in Mumbai while also ensuring that there is no reflection of today's time. We had to hunt for unique and great locations because today, everything in Mumbai is modernized. I remember that once we were shooting on a pavement and realised to our horror that the tiles out there belonged to the 21st century. We had to cover all of that. If we don't take care of things like these, it will fail to live up its authentic feel. This is why the making of such a film takes time."