It looks like the battle lines are clearly drawn. And it always helps to have ‘powerful’ allies on your side. Buzz is that in the ongoing tussle between Ajay Devgn’s Son of Sardar and Shah Rukh Khan’s Jab Tak Hai Jaan has just got a whole lot interesting. Our sources say that Salman Khan, Devgn’s close friend, has decided to join in the game.