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https://www.themarysue.com/ghostbust...rrive-in-2019/
"there is a demand for Holtzmann, Yates, Tolan, and Gilbert."
The all-female Ghostbusters ride again? No, it doesn't necessarily sound that way. It's really not clear at all that this IS a sequel, or even has anything to do with the female Ghostbusters. The line in the article about "Response to Ghostbusters: Answer the Call was mixed, but there’s no doubt, with the inclusion of the all-female team in video games and comics, that there is a demand for Holtzmann, Yates, Tolan, and Gilbert" was entirely speculative of the article writer. And not really accurate, in any case. They appear in the video games because the video games were already in development before the movie even came out, not because the movie was a hit and there was all this fan demand. It would have cost them more money NOT to release the games. They appear in the IDW comics because IDW wanted to use them (probably an attempt to cash in on controversy... smart), not because anyone was beating down their door for them to do so.
This offers a clue:
http://ghostbustersnews.com/2017/07/...uring-cg-egon/
If they are actively talking about whether or not they should or will do a CGI Egon... and this says they are... we can kind of figure out where their head is for the new movie. The originals are coming to the forefront.