Aykroyd said Sigourney Weaver is on board now, as are the original squad of ectoplasmic specialists -- Aykroyd, Bill Murray, Harold Ramis and Ernie Hudson. Murray's presence was the pivot point in making a third film happen.
"We could be in production by winter."
The script is by Lee Eisenberg and Gene Stupnitsky, the writing team behind the upcoming Jack Black/Michael Cera movie Year One (directed by Ramis), and Aykroyd is enthused about its premise of a new generation of Ghostbusters taking over the duties of the aging team. Aykroyd said he wishes Ivan Reitman would return to direct the third film in the series but that he's "too busy as a mega-producer" to take it on; his second choice is Ramis, who, of course, co-wrote the first two Ghostbusters films with Aykroyd and has numerous directing credits, most notably Groundhog Day and Analyze This. "He has a lot of things going on, but it would be wonderful to see him do it."
The details of story are still in play, but Aykroyd said he's hoping for a five-member "new generation" team with several female members. "I'd like it to be a passing-of-the-torch movie. Let's revisit the old characters briefly and happily and have them there as family but let's pass it on to a new generation."