Didn't someone drop the news a while ago that Harold Ramis had already began doing re-writes of Akroyd's original GB3: Hellbent script a couple of years ago?
Somehow, I just tend to think that this movie never really died. It might be dormant or in a coma until someone decides to brush it off and give it the greenlight. Don't think it couldn't happen, because that is a common occurence in Hollywood. It took Spider-Man over 30 years to be made into a movie, The Hulk 12 years, and The Matrix almost 6 years. So, I can't ever rule out the possibility for a second GB sequel no matter how bleak the odds seem now. Truth be told, it's become folklore in the American conscience and legendary worldwide. I'm not just speaking as a Ghosthead when I say this, but as an avid moviegoer. Ghostbusters is too big a commodity to ever let go to waste.