Just for the fun of it, here's John Landis' son Max and his
ideas for Ghostbusters III. He warns, however, since he didn't pitch it and the reboot was well underway anyway, that it should be treated as fanfiction and nothing more (and sometimes it certainly reads like it).
There are a couple things I like in it, a couple things that are just straight up self-indulgent, and a couple things that would probably be scaled back had it actually been picked up for a movie treatment.
Max, being the son of a legendary film director, knows the cast members on a different level than most of us; with that said, it's funny how the original cast became analogues for their characters: Stantz/Aykroyd is loopy and too nostalgic for his own good (which we *just* discussed in this thread), Venkman/Murray would like nothing to do with it (though the cameo is pretty fitting), Zeddemore/Hudson is enjoying more fame and success now than he ever did in the 80s, and Peck/Atherton is redeemed for simply doing his job.
Like I said, this is self-indulgent at times, and it sometimes reads like a kid with no restraint, like the cartoons being canon (in a different way, of course). But perhaps the best part is the, "Avengers of comedy in 2016", which is really what any Ghostbuster movie should have anyway.
Anyway, for me it was a fun read and Landis is a good writer, but it's a bit too much, too nostalgic, and much too aware that lightning struck the first time around; despite being separate and realized characters with their own problems, the main cast are too busy revolving around what happened in the previous movies to really leap out on their own, and to me that would be a major hurdle for a story that's relegated the originals to supporting cast.