Not to suggest any especially recent developments have come about, but the movie (that has been in development hell for over a decade) is apparently finally going into production.
Originally Posted by Wikipedia
On January 13, 2010, Ivan Reitman confirmed that he will be directing the film. In March 2010, Bill Murray appeared on Late Show with David Letterman and talked about his return to Ghostbusters III, stating "I'd do it only if my character was killed off in the first reel". In an interview with Coming Soon, Murray said: "You know, maybe I should just do it. Maybe it'd be fun to do." On May 3, 2010, both Harold Ramis and Dan Aykroyd confirmed that a third film had already begun production and that filming would begin in fall 2010. Aykroyd said a release is set for Christmas 2012.
During a 2009 interview, Ramis stated that the project stalled due to lack of interest and motivation to do it. Both Ramis and Aykroyd have confirmed that the script would call for a new group of younger Ghostbusters taking the lead, with Aykroyd stating, "There’ll be a whole new generation that has to be trained and a leader that you'll all love when you meet her. There'll be lots of cadets, boys and girls who'll be learning how to use the neuron splitter and the inter-planet interceptor - new tools to enable them to slip from dimension to dimension." Harold Ramis and Dan Aykroyd were in the planning stages and the film was expected to be released in 2011 with Bill Murray on board. Rick Moranis had not officially stated whether he will or will not be a part of the sequel as he has retired from acting. Sigourney Weaver said she expected to return alongside all the other original cast.
He has a shoe in with Harold Ramis. The two have worked together before. And they need someone to fill the role of Oscar who is about that age and who knows their way around comedies. Cera apparently said something to USA Today about that, though:
Ghostbusters is the most influential movie of my childhood... and I would not want to be the reason that Ghostbusters was all of a sudden bad.
He is one of the worst casting choices anyone can make. Please, no.
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Movie has apparently finally been green-lit and filming is scheduled to begin in May 2011:
In October 2010, Dan Aykroyd gave Vanity Fair an update on the status of the Ghostbusters 3 script, written by Gene Stupnitsky and Lee Eisenberg: "I’m working on the script now and those two—Stupnitsky and Eisenberg, [writer-producers of The Office]—wrote Bill the comic role of a lifetime, and the new Ghostbusters and the old are all well represented in it...we have a strong first draft that Harold [Ramis] and I will take back, and I’m very excited about working on it." Shortly after that interview, at the Spike TV Scream Awards, Bill Murray appeared to accept an award for Zombieland. He appeared in full Ghostbusters gear, but gave no statements regarding the film. On October 14, 2010 Stefano Paganini, Sony's Product Marketing Manager in charge of Catalogue, Animation, and TV series, appeared at a Ghostbusters event in Rome and said "I spoke about this night with my boss from Los Angeles. She allowed me to let you know that the script of Ghostbusters 3 has been approved so the engine has been turned on!" The official press release has yet to be issued, but is expected within the next month. The original cast will return while casting is currently underway looking for young Ghostbusters.
Bill Murray said he'd only do the movie if he died in the first reel. I didn't read all the articles and quotes in here so I may be reposting this but I think Bill Murray may become a ghost in the movie.
After years of rumors, it appears that Ghostbuster 3 is finally moving forward and will likely do so with or without Bill Murray's involvement. Dan Aykroyd appeared on The Dennis Miller Show to discuss the project, dropping specific details about the sequel, hinting that the plan is to film in Spring of 2012 no matter what happens casting-wise.
"Yes, we will be doing the movie and hopefully with Mr. Murray," he says, "That is our hope. We have an excellent script. What we have to remember is that 'Ghostbusters' is bigger than any one component, although Billy was absolutely the lead and contributive to it in a massive way, as was the director and Harold [Ramis], myself and Sigourney [Weaver]. The concept is much larger than any individual role and the promise of 'Ghostbusters 3' is that we get to hand the equipment and the franchise down to new blood."
The comedian also confirmed reports that the plot will revolve around a new generation of Ghostbusters and hinted at the states of his and Ramis' characters.
"My character, Ray, is now blind in one eye and can't drive the cadillac," he says, "He's got a bad knee and can't carry the packs... Egon is too large to get into the harness. We need young blood and that's the promise. We're gonna hand it to a new generation."
As for who might be cast as the new characters, Aykroyd says that, while no decision has been made, he does have a fondness for one piece of prospective casting.
"I like this guy Matthew Gray Gubler from the 'Criminal Minds' show," he adds, "But there's going to be a casting. We're going to see everyone that wants to do it. We're going to need... three guys and a young woman."
I like the idea of them making a new generation of ghostbusters if done good, but this movies had a rocky start to begin with, and with Bill Murray not being certain I'm worried they might not pull it off.
I'm sure it'll do well in the box office from name alone, but I do hope it's good enough to warrant a new line of movies afterwards.