Ghostbusters III

Plot
Twenty Six, years The Ghostbusters have been on again/off again travelling world wide, ever know and then using new concoctions of technology, having rookie after rookie, The team of supernatural busters have had it easy and hard for the past twenty six years, until meeting a similar team that uses Magic capture the evil forces of supernatural whom' call themselves "The Real Ghostbuster" (Jake Kong, Eddie Spencer and Tracy the Gorilla).

That conveniently come to New York City and accidentally unleash several Black Magic Wielding Other Worldy spirits they caught in Hong Kong into and was New York, City so its up to The Ghostbusters and The Real Ghostbuster to stop them.

Sequel
Ghostbuster IV: Aftermath

Spin-offs
The Real Ghostbusters