Shankar, the daring director of 'Endhiran' revealed on monday that Amitabh Bachan was offered the role of Robo . He divulged it at an interview that he was giving to a top television channel in India. The director said that Mr Big B rejected the idea because he thought that the character would not be accepted by the audience. He also added that Rajani was extremly pleased when he was informed that Mr Bachan was offered the role. Shankar promised the all anxious fans and audience that Endhiran will be a promising visual treat to people.