Rajinikanth and Kamal Haasan are good friends who share a wonderful rapport and a common mentor, K Balachander. In the early days when they had just established themselves as stars they made a pact promising never to get in each other’s way and they continue to respect this agreement.
It had appeared that Vishwaroopam and Kochadaiyaan will be clashing but Rajini and Kamal had a secret meeting where they decided on a course of action to avoid a clash. It has been decided that Kamal Haasan’s Vishwaroopam which has been wrapped up will release first in October whereas Rajini’s Kochadaiyaan which still has extensive post-production work pending will follow at the fag end of the year.
Kamal Haasan confirmed this to the media, "We’ve made a pact not to clash. It would do no good to either of us to release films together. It’s because of economics that Rajini and I have not come together since our mentor K Balachander’s Ninaithale Inikkum in 1979."