I've only seen Ghostbusters 1 an age ago, so mostly for selfish reasons, I wouldn't mind it being based solely on the original movie. The thing is, all the smaller locations (Metro, Waterworld-ish, more than likely Mummy) are taken up, so Ghostbusters will probably get plenty of space for itself.
It's been a while since I've seen the movie, but I almost think it'll be like the Poltergeist maze, where most of the maze takes place during the "climax." IE enter the Firehouse with a bumbling Walter Peck actor, go on to the library and the Hotel with Slimer, into the apartment with the Gozer dogs, out into the New York streets and 35 Park West, and then a little black "choose the form of your destructor" hallway with a Stay Puft giant head in it; maybe some projection screens afterwards, black hallway with theme song and Stay Puft/Slimers, the end.
I'm liking this maze, boys.
(Although I am interested in seeing what the new reboot is about, the 2019/2020 version that's coming out soon. That has future potential, I think.)