After Chennai Express, Shah Rukh Khan is once again joining hands with Rohit Shetty. The superstar will be seen in latter?s next production venture with is yet-to-be titled. The film will go on floors pretty soon and we hear the Singham Returns director is apparently eyeing Christmas release for the same. Well, if that?s the case then SRK?s untitled flick will clash with Ranbir Kapoor?s Tamasha and Ranveer Singh?s Bajirao Mastani. Now it would be interesting to see three big banner production ventures releasing during the same period, hai na?