IGN has an article on the Zootfly Ghostbusters game.
“We are very glad to see the overwhelming response to the Ghostbusters prototype movies. What you’ve seen is indeed in-game footage of early prototypes on the Xbox 360, running on ZootFly’s proprietary engine. Due to licensing issues, further development of the Ghostbusters game hit a bump on the road. But everybody here at ZootFly is working actively on resolving the challenges with the owners of the Ghostbusters IP.”
“Not to lose the momentum, a part the ZootFly team is currently working on an original game called TimeO, which is closely related to Ghostbusters. The game follows the adventures of two die-hard New Yorkers. They get trapped deep in the shadow world of a parallel New York. The city itself is a war machine threatening to wipe out our world and they have three days to stop it. As soon as the Ghostbusters IP issue is resolved, the whole team will go back to Ghostbusters.”
What that means is that they were hoping to secure the rights, but it has currently fallen through. If nothing else, it puts to rest all the party-poopers who cried, “cheap mod!” Big thanks to Nik for the link.