The director needs a special villain for this movie. The character of this villain is something high tech but poisoned with a sugar coat. For this role, Prithviraj is said to be the first choice of Mani Rathnam and he has almost finalized Prithviraj to play the role.
Though Prithvi entered Tamil Cinema playing a villain in Kana Kanden, hit films like Paarijatham, Mozhi and Vellithirai have now given him an image of a soft hero.
Mainstream actors usually won't try doing a villain role and damage their image of a hero that they have attained after much hard work. But Prithvi is accepting the role just to add a new colour in his career.