The Ghostbusters video game from a few years back was the real Ghostbusters 3 as far as I'm concerned.
Not only is Ghostbusters old, but the idea of recasting existing roles is also old. There are literally no new ideas here.
But that's the state of the movie industry today especially with all of them crying about how they're not making enough money and piracy and how the home theater market is forcing them to spend more to draw to the cinema.
And because the system is stuck in a cycle of profits and distribution, there's no way out of it for any of them. Actors want to get paid, effects people want to get paid, crew and director and screen writers want to get paid, studios want to turn a profit every time and everybody complains if one faction isn't getting their fair share and then groups like SAG and other unions come in and then the whole fair market value thing comes into play.
It's a many headed beast and it can't be killed.
So the answer? Sequels and gimmicky remakes guaranteed to turn a profit. And while I'm not opposed to a sequel if it's warranted or, at the very least TRIES to surpass the original or expand on the original concepts, for the most part they just end up like Transformers and G.I. Joe.
However, that doesn't mean an all female ghostbusters is going to be terrible for certain.
Just probably.