Kangana Ranaut’s ‘Thalaivi’, Alia Bhatt’s ‘Gangubai Kathiawadi, R Madhavan’s ‘Rocketry’: Upcoming biopics we can’t wait to watchKangana Ranaut’s ‘Thalaivi’, Alia Bhatt’s ‘Gangubai Kathiawadi, R Madhavan’s ‘Rocketry’: Upcoming biopics we can’t wait to watch