"Work is in progress. It is still in scripting stage. It's a heist film," a source said.
Since the makers are yet to lock the script, the cast has not been finalised.
Quashing rumours of either Jacqueline Fernandez or Katrina Kaif being approached for the film, the source said, "It's not a multi-starrer film. We are yet to cast anyone."
Earlier, it was reported that Katrina will be seen opposite Sushant Singh Rajput in the film that is going to be co-produced by Karan Johar.
The "Dostana" director's film will go on floors next year.
Besides this film, Salman will be producing and acting in Kabir Khan's "Tubelight", which will go on floors by the end of this month.