"It looks like Sony have officially announced that Ghosterbusters 3 will be arriving in 2013! Yes that’s right Ghostbusters 3 has a release date, or at least a release year!Just take a look at this Licensing Trade magazine cut out from the Licensing International Expo is happening right now in Las Vegas."
Source: http://www.toys-and-gadgets.co.uk/ghostbusters-3/ghostbusters-3-movie-arriving-2013-official.html