Bollywood superstar Shah Rukh Khan's upcoming film, Fan, is clearly one of the most eagerly-awaited movies of the year – mainly because of its unique story idea. While it is known that the plot revolves around a fan's obsession with his favourite movie star, it is unclear whether the film has any dark undertones – like Yash Chopra's classic psycho thriller Darr.

Rumour mills are in overdrive about some key details regarding the plot of the film. Apparently the film's storyline will focus on "a rivalry between the superstar and his biggest fan," reports Business of Cinema. "It is also said that the film has an action sequence towards the end which will play a very important role in the whole scenario."

Reports indicate that SRK's character in the film, named Gaurav (who plays the diehard fan) will be seen wearing some of the actual clothes worn by the star in earlier films – like the hat and leather jacket from Dilwale Dulhaniya Le Jayenge.

Fan is expected to be a very different kind of SRK film, and judging by the promos, it definitely looks like the film could do well on the box office. In an earlier interview, Khan himself indicated that Fan is more of a novel subject and quite unlike his regular blockbuster masala films like Dilwale and Happy New Year.

"If you're looking for novelty, then you should watch out for Fan," said SRK. "It's a different kind of film, meant to be a niche... not a blockbuster."

The Bollywood star added, "Films are novel in their storytelling, unless you have a completely niche or offbeat subject, and you take a subject not touched upon". Fan opens in theatres on 15 April 2016.