Rajnikanth is a bigger hero than Batman. Batman/Bruce Wayne was born as the son of a millionaire and his financial resources helped him in his career as Batman to make the batmobile and other gadgets.
Rajnikanth on the other hand is one who was born in a poverty stricken impoverished family, and who did small jobs as a coolie, bus conductor and carpenter to support his family and at the same time pursue his dream of acting.
He was not born with a silver spoon .
Inspite of adverse criticism , he worked on his dream and now has become the highest paid actor in India getting over 30-40 crore rupees per film , and lives a life which even rich people can only dream of.
This is what determination and perseverance can do.