A biopic on astronaut Rakesh Sharma seems to be in trouble over the leading man of the film. First Aamir Khan opted out of the project, he then suggested Shahrukh Khan's name. However, SRK too backed out after his film Zero failed miserably at the box office. Vicky Kaushal was too seriously considered for the part, however, the actor opted for Udham Singh's biopic over Saare Jahan Se Accha. The film is on the back burner for quite long now. But seems like there is a development on the process of the film. Producer Siddharth Roy Kapur is keen on having Ranbir Kapoor on board. However, since Ranbir just did a biopic (Sanju) he doesn't want to go in the same genre. Time will tell the fortune of the Saare Jahan Se Accha movie.