According to reports, the Ranbir Kapoor, Alia Bhatt and Amitabh Bachchan starrer upcoming film 'Brahmāstra' will be made on a budget of ₹100 crore. Produced by Karan Johar, it will be the first part of a fantasy adventure trilogy. Said to be a science-fiction film, 'Bharmāstra' will involve a lot of action, which will require training in gymnastics and horse-riding.