Mumbai: While his upcoming film 'Don 2', a sequel to the 2006 film 'Don- the Chase Begins Again', is slated for a release in December this year, director Farhan Akhtar has hinted at one more flick in the series.

'Don 2 - The King is Back', an action thriller, is a sequel to Akhtar's earlier film, which itself was a remake of Amitabh Bachchan-starrer 'Don' (1978).

When asked how long will audience get to see films from the 'Don' series, Farhan replied,"The story of the film does not end here. Just the way it is difficult to catch the is difficult to end the story."

"I made the sequel to the first film as people were asking me if I was making any. Earlier I had not thought of making a sequel...but the appreciation and constant curiosity let me think on the second instalment of 'Don'," he said after unveiling the trailer of 'Don 2'.

The film starring Shahrukh, Priyanka Chopra, Boman Irani, Om Puri, Lara Dutta and Kunal Kapoor is set to release on 23 December in 2D and 3D formats.

On Shahrukh Khan, Farhan said, "SRK is the king of this film".

Wishing Shahrukh success for his superhero film 'Ra.One' that hits the cinema houses today, Farhan said he is not bothered by the actor's absence at the promotional activity.

"Don ko pakadna mushkil hi nahi, namumkin hain, as he is busy with 'Ra.One'. This is justified. We did not want to disturb him at this point of a time. He is aware about the promotions being done for 'Don 2'... his involvement will start soon," Farhan said.