Creating a multiverse of Ghostbusters would also allow for team-ups and films that result in crazier and higher stakes adventures.
Ok, I’m mostly kidding about that, but a similar large scale adventure with teams of Ghostbusters sounds fantastic.
Ideally, I’d like to see a “Crisis On Infinite Earths” scenario, and the only way all the Ghostbusters succeed in the ultimate battle against the undead is via Peter Venkman crossing the “ultimate stream” and sacrificing himself so all worlds live.