There is some news surrounding that Rajnikanth is not well who went to a trip with family to America. We don't know is this true are not. In this process Kollywood sources spreading one more news. Rajni wore a costume of Robo for 'Robo 2.0' which is nearly 40 kgs.
He wore those costume in summer and participated in shooting. May be this ks the reason for his illness. So, Shankar said to costume designer to decrease the weight. Let's wait for the official announcement what actually happened.