Its been a while since I posted, for that I apologize. Well it turns out back in November 2010 when I posted "It looks like Ghostbusters 3 is a GO!" I may have spoken a bit prematurely...
I guess I'm not the only Dan getting frustrated by the lack of progress on this.
Addressing the studio heads at Sony, Aykroyd said that it’s “time now to sit down and make this movie, or you will lose your main principals, and you won’t be able to make it without us, because we have rights, and now is time to make the movie.”
He suggested that if the film were not green-lit within “three or four months,” the deal would be off the table.
The rights to the Ghostbusters franchise are in part-owned by Sony, Aykroyd, director Ivan Reitman, co-writer Harold Ramis and Bill Murray.
Murray has held out from signing on to the third film for the past few years. Aykroyd hinted in the interview that Murray may have “abrogated his rights” when he declined to star in “Ghostbusters 3,” forfeiting his need to sign-off on the film’s green-light.
Source -> http://popwatch.ew.com/2012/12/06/ghostbusters-3-dan-aykroyd/ & http://abcnews.go.com/blogs/entertainment/2012/12/dan-aykroyd-lays-down-ghostbusters-3-ultimatum/