From what I've heard most of the ‘proposed’ GB3 storyline seems to revolve around the Ghostbusters returning to stop Hell from emerging and destroying the world.
I'm not too keen on this because it strikes me as being a tad far-fetched for my liking, authough existing in a world of fantasy both GB1 and GB2 had a degree of realism in both storys.
I don't think that fighting Hell is really the way the francise should go (if at all), surely the most logical step to take would be to try and keep it as down to earth as possible whilst sticking to the things we love the most about the Ghostbusters universe.
I might be wrong here but didnt Egon refer to Gozer and Zuul as demi-gods in GB1?
If that WAS the case then why don't we take that one step further by introducing a demon with more power (a god perhaps) that attempts to merge the spirit world with our world, this could mean that we get to see the old characters but we also throw in some new characters (if at all) to cope with the threat as well as some new gadgets and vehicles.
Does anybody remember the ECTO-2 helicopter?
Imagine if you will an aerial combat scene involving the Ghostbusters chopper squaring off against a hourde of airbourne creatures.
The possibilities are quite literally endless and if GB3 does go into production (and we all hope it will) lets hope that they really knuckle down and put some effort into it and make it one of the best films of all time.