So these are Egon Spengler's grand children? Who did Egon gotten together with? i only think it was Egon since he was the one who collected the fungus and mold? I keep picturing the kids more resemble him.
in the GB2 scene where Egon and Ray meet up with peter, you get this line:
Peter Venkman: Hi, Egon. How's school? I bet those science chicks really dig that large cranium of yours, huh?
Egon: I think they're more interested in my epididymis.
suggesting that maybe Egon wound up with one of his grad students?
That's what I was thinking. But it's weird that there hasn't been any ghost in 30 years though.
Containment Union must have been somehow transported on a special thing I mean how else can you explain how they move something that needs a lot of power physically to a new location.
eh, this isn't a unknown thing for the setting. in Extreme Ghostbusters, there hadn't been a ghost sighting for over a decade, and the team had moved on to other things, with Egon teaching an advanced class in parapsychology and physics using the stuff he'd learned as a ghostbuster. when a new source of ghosts crops up, his students end up as the new team.
honestly this has some of the same feel, only for the live action continuity.
perhaps ghosts require a certain level of background energy to manifest, which in GB1 was being provided by Ivo Shandor's high rise temple, and in GB2 by the possessed painting of Vigo the Carpathian. (the videogame actually links these two, by having the mood slime tunnels being the result of a mechanism Shandor built into the geography of Manhattan to concentrate spiritual energy.. which created the slime. and Vigo just tapped into this to get the energy needed for the events of the 2nd film)
in the trailer, it looks like the kids visit a "shandor ranch", so perhaps the thing in the old mine is a nexus of power, and with it starting to act up, ghosts can again manifest ectoplasmically.