The pre-bookings have commenced and the Diwali clash is well on it’s way. The initiative is currently running in PVR cinemas country-wide. Sources say that this will allow producers to gauge the lead that one of the two films will take in the end. "As expected, the day of release mentioned by both is 13th November. If there was ever any doubt about the Shah Rukh and Ajay clash being averted, it is now final that Diwali clash is for the keeps. Guess it's time we stopped speculating on whether it would be averted after all. With pre-release plans being open for both the biggies, the advance collections would be very closely monitored”, said the source. An industry top-notch source says, “This is as fair as a battle as it can get. The next three weeks would be a clear indicator of which way these films are going. All this while the clash was pretty much in thin air but now with pre-booking opening three weeks in advance, the countdown has begun. Expect the makers of both films to start flashing progress of their films in days to come.” This could very well be the biggest Diwali box office clash we've seen!