Though writer Anjum Rajabali has pooh-poohed reports that Shah Rukh Khan is walking out of astronaut Rakesh Sharma's biopic, speculations continue. Adding credence to the rumours is producer Ronnie Screwvala's recent cryptic tweet.

He wrote, "Most times the difference between success and failure is not a better idea or ability but the courage to bet on the idea, pre-plan to perfection, take the calculated risk and then stick with it (sic)."