If there is a sequel, what will be the plot?

Rating: Null/10 (15 April 2003)

My friend popped in that question to me. If Fight Club would have a sequel, how will the story go?
But for me, I don't think there is no point in having a sequel. True, the film is open ended but films like that would have to have an indefinitive ending so that there is room for imagination for the viewers.
What do you think? Is there a room for a sequel?