Salman Khan was signed on to do an important extended guest appearance for the film .
Salman Khan was opted out because of differences with the film 's lead pair ( Shahid Kapoor and Kareena Kapoor ) .
Salman Khan was signed on to do an important extended guest appearance for the film but opted out because of differences with the film 's lead pair ( Shahid Kapoor and Kareena Kapoor ) .