Sidharth Malhotra, Alia Bhatt, Fawad Khan and Rishi Kapoor have been roped in by Karan Johar for Kapoor and Sons. Rumours suggest that Fawad, Alia and Sid will play siblings in the film but apparently that might not be the case. Here are 5 things we?d like you to know about the Karan Johar film?