My Idea I Made Up Awhile Ago Was That The Devil Is Ticked That All Of His Creatures Have Failed Against Mere Mortals With “Nuclear Accelerators On Their Backs” And Does The Job Himself. Now I Don't Say He Is Destroyed And Hell Is Gone Cuz Then Where Would Killers, Rapists And Lawyers Go. I Just Say He Goes Back To Hell. And Possibly He Has A Full Scale Assault On Earth Which Though Would Be Pretty Tough Too Beat

I think that they should have the ghostbusters from the episode citizen ghost where they form the ghostbusters, that would be pretty cool, or maybe sumethin like the episode ghost fight at the ok corral.

Usually the 3rd movie is the end of the series/story and making it all fit into a trilogy, and it usually refers back to the original in some way or another. Which asks this question…

What if Gozer, the almighty being that it was, was actually a minion of someone… or something?

Imagine if Gozer was the right-hand man to Hades the leader of the Underworld! This idea was somewhere on this site, but I still think the idea is hellishly good.
(I was going to say the Devil, but think about how many Devil orientated movies there are out there, Devil's Advocate, the one with Arnie in it where it was the end of ‘99, I know there’s more)

yeah good ideas guys! i think the being a right hand man is good maybe to something thats bigger then a ghost and the GB tools dont work on it so they have to think up new Gadgits