Spoiler Alert!!
Story: A very strong script with a lot of family value, Drama, Thriller and a little bit of Science fiction. It is quite different from any other K.V. Anand movies. But this director has a poor romance sense. None of his movie has good romance but always becomes a trade off for other elements. Same goes for this movie. But major portion of the story was misleaded from the promoted theme. A very emotional notation on blood relationship and public concern.
Screenplay: Talking about the screenplay we should look from the broader view of the movie especially the technical aspects. the CGI used is known as motion capture tech, as we can see there were a few flaws in it. First thing is Vimalans head coordination and details. Most of the scene were obvious that it is a CG work. But some were unidentifiable. Should have been consistent. But suriya's body coordination was good. Can see some hard work there. The intro was super good as in the birth of the twins but after the intro songs the movie was a bit average due to poor romance scene. Humour was good as usual the comedy dialogues were natural. But most part of the movie resembled 7am Arivu due to some similarities such as genetics subject, dangerous disease, billions of peoples life at stake and the hope on hero to find the solution. Due to that the story diverted from the original theme of conjoined twins to something else. so you wont feel the purpose of having conjoined twins subject. The movie can be divide into 4 parts. the first part you will find the movie is draggy for having unnecessary romance, second part you will feel the value of family and blood relationship, Third part the thriller which gains your curiosity and it gets draggy again and last part is father son relationship and justice. Another weakness in the movie is the stunt work. Most fight scenes involves wire tricks which is so not K.V. Anand style except the twins fighting scene which was quite good. And Climax action was poor. Too much tiny illogical acts becomes a flaws in the movie. For example showing Mankatha and Nanban showing at cinema at same time, the climax gun shoot scene, Father keeping the evidence rather than destroying it and a few more. But K.V Anand had a trade off for all that with valuable messages.
Music: The music was composed by Harris Jeyaraj, all the songs were well picturized. the transitions are better than Ko.
Plus Point: Story, Brotherhood relationship, The twins fight scene, Songs
Minus Point: CGI, Diverted second half, action scenes, romance, Lengthy
Verdict: An average entertainer, if you watch without expectation you will enjoy the movie. But definitely not K.V. Anand's Best