I just pulled this off of the site “Comming Attractions”, and it came from Dan's lips 2, thats TWO years ago:
“It doesn't look like it's going to happen for the same reason they aren't going to make Men In Black 2. The above the line cost is way too much for the studio to see it to be economically feasible. It's a shame too because everyone wants to do it. Even Bill Murray said he would work a few days on it. I did finish a script. Harold Ramis liked parts of it. Ivan Reitman liked parts of it too. There's definitely an interest from all of the original parties invovled to make it. But the studio just doesn't want to take the risk. My personal opinion is when you look at the success of the other two..well, there would be plenty of money to go around for everyone. So unfortunately, it looks like its just not going to happen based on the studio's feelings, not from anyone else.”
-You could tell when he talked about it he had a definite feeling of regret that it's not going to happen.-
Well, I guess thats proof that Bill did want to do it, so its the studios fault. BUT, it was exactly 2, thats TWO years ago that “ghostbusters3.com” went up.