No official reason was given as to why Farhan was getting replaced, since the replacement was quite curious for two reasons. First, It was Farhan himself who was producing the film along with Red Chillies Entertainment. Secondly, it looked to be a very lucrative role, since Nawazuddin Siddiqui never says yes to lesser roles going by our past experience. So what was it that Farhan rejected the offer to act opposite King Khan?
Well, the cat is now out of the bag, as Farhan Akhtar had finally revealed why he is not a part of the film. During a recent media interaction while launching the trailer for Wazir, he said that he was not doing the film because he was already playing a cop in Wazir! Since Raees was happening after Wazir, he felt there is no point in repeating the same character. So Nawazuddin Siddiqui got on board, instead!