Speaking with Heeb, Harold Ramis revealed that he expects production on Ghostbusters 3 to begin next summer with a plan for release in 2011:
Something’s going to happen. Dan [Aykroyd] did write a spec GB3 screenplay a few years ago, but no one was motivated to pursue it. Now, 25 years after the original, there seems to be some willingness to proceed and apparently a substantial public appetite for a sequel. We’ll introduce some new young Ghostbusters, and all the old guys will be in it, too. Think Christopher Lloyd in Back to the Future…GB3 is progressing with plans to shoot next summer and release in 2011.