Produced by Ayngaran Films International, Robot is the first multi lingual film, which will be made in 4 languages i.e., Tamil, Hindi, Telugu and English. Since it is the film based on writer Sujatha's complete science fiction, there will be lot of CG works to be done to make the film with international standards. This is the main reason for Shankar's US schedule.
For Rajini, the success of film is a prestige issue. So he gave unlimited call sheet to this project. Only for Shankar's convenience, Rajini completed his daughter Soundarya's maiden venture Sultan - The Warrior quickly and came to this mega project.
Best of luck!