How it COULD work…
Dan Aykroyd and Harold Ramis write a script that is SO AMAZINGLY GOOD that;
1) Ivan Reitman agrees to direct it.
2) Bill Murray agrees to return
3) Sigourney agrees to return
4) Sony agrees to pony up $50+ million to make it
So the onus is on Aykroyd and Ramis to put down the sabres and shields and create a project worth producing.
There seems to be the assumption that Dan Aykroyd is the master of Ghostbusters, which to a certain extent is true, but keep in mind he's been the master of other comedy classics and come up short.
A case in point - Blues Brothers 2000. Those of us who grew up on Aykroyd and Belushi, followed their careers and held Blues Brothers as a film for our generation. We wanted to see them do a sequel. When Belushi died, that dream died with it, except for the extreme hardcore “Blues Brothers for the sake of Blues Brothers” fanatics and Aykroyd himself. So, just because they COULD and not because there was any real point, it was made - and a larger plate of turdburgers is hard to find.
I hold the original BB as one of the top five comedies of my generation. GB is also on that list. Animal House, Stripes and Caddyshack are the others. Remember how bad Caddyshack 2 was? I actually shelled out money to see that stinker in the theater. Another classic that could and should have been left alone.
So you have Aykroyd who PROVED he could take beloved icons of his and past generations and turn out disappointing material (Dragnet, Coneheads, BB2K) I have to say Dan should NOT be regarded as the Gene Roddenberry of the Ghostbusters franchise. He needs to be watched closely and edited as he was for the first movie.