full story here
http://www.bbc.co.uk/news/world-asia-28014069
A North Korean foreign ministry spokesman said in state media that the movie's release would be an "act of war".
He did not mention the title, but a Hollywood movie called The Interview with a similar plot is due in October.
Hollywood actors James Franco and Seth Rogen star in the action-comedy film.
Rogen, who is also one of the directors of The Interview, has since responded on Twitter saying: "People don't usually wanna kill me for one of my movies until after they've paid 12 bucks for it."
lol at the last bit