Ram Gopal Varma's next project, 'Rai', was supposed to roll earlier this month, but we hear the schedule has been pushed back to July-end. Vivek Oberoi, who will portray gangster Muthappa Rai in the thriller, apparently had to drop plans of starting shoot as the makers of his next release — sex comedy 'Great Grand Masti' — decided to kick off their promotional campaign this week.