Director Ivan Reitman and Sony Pictures have just sent the Ghostbusters 3 script to Bill Murray, reports Deadline, and are holding off on the project until they hear if the mercurial actor likes what he sees:

"The studio won't even think about forward on a $150 million film unless Bill has a closed deal and a commitment," said an insider. "It's too huge a risk to do any meaningful prep, hoping he shows up."
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The script was written by The Office writers Lee Eisenberg and Gene Stupnitsky, with Dan Aykroyd, Harold Ramis and Ivan Reitman adding their own touches before sending the script to Bill Murray. The script brings back the original cast, who pass the torch to newcomers, which sets up future installments.