ecause moving representative armies around a board and getting angry with your backstabbing friends for several hours is a good movie plot:

Sony Pictures announced today it's acquired the motion picture rights to the board game of world conquest, "Risk", from Hasbro. Doug Belgrad and Matt Tolmach, presidents of Columbia Pictures, say the film will be produced and developed by Hasbro’s Brian Goldner and Bennett Schneir and Overbrook Entertainment's James Lassiter. Belgrad pointed to the success of movies from toys Transformers and G.I. Joe (but not to the dismal movie from the board game Clue) to claim audiences have "shown a great desire for films that bring to life everything that has made these franchise properties stand the test of time."

http://www.iwatchstuff.com/2009/11/risk_the_film_of_world_dominat.php