Ace director Shankar is maintaining utmost secrecy on his next project after his film I with Vikram bombed at the box office. Many are trying to findout details about his upcoming film and with whom he is doing it. Though it was rumoured that Shankar is ready to come with Robot sequel with Rajinikanth in lead, some say sequel may star another hero. Bollywood is abuzz with news that Sharukh Khan may act as a villain and even Chennai sources say the same. Though Shankar is maintaining secrecy, Kollywood sources say he and script writer Jaya Mohan are working seriously on Robot 2 script.