I've been staying out of this to keep from living down to my reputation, but here goes...
Wiggyof9 wrote: ↑July 13th, 2019, 12:50 am I don't understand the people that think the kids are Egon's grand kids. GB2 was 30 years before the events of this movie. At that time, Egon had no established love interest. Even if he immediately settled down and had a kid, it would be unlikely that that kid would have kids of of their own that are the age of these actors. Could they be related? Sure. Grand kids? Seriously doubt it.
Alphagaia wrote:Also, no established lovelife?.

--Excuse me?
On the surface, GB2 does sure seem to make this idea harder, no argument. On the surface.
However, scratch just a little bit beneath the surface, and in 1989 at least one fan (me) and at least one writer of official Columbia-licensed material (James Van Hise of the RGB comic) noticed a big gaping loophole that the latter went ahead and
drove a truck through.
That loophole? In GB2 Egon and Janine never actually appear on screen together save in the "We're back!" commercial, which was, in-universe, a staged narrative. RGB and even IDW basically took the whole unpopular Janine/Louis subplot and chalked it up to a passing thing, with Janine possibly disoriented by the mood slime flow. Going by the movies only, forgetting RGB, GBVG, and the IDW universe, Egon and Janine's real status in 1989 could be whatever Jason Reitman says it was that works best for his idea.
So yeah, in a universe where the only things you *have* to use are GB1 and GB2, it's not impossible that a Spengler baby was born in 1985 and would thus be 35 by 2020. And thus if Spengler Jr, unlike his/her parents, fell in love and married early (c. age 20 c.2005) Spengler grandchildren in their early to mid-teens or younger would be plausible.
If the Reitmans are as aware of fan sentiments as they otherwise seem to be, doing something along these lines would be a major crowd pleaser, and yeah, tie in to the events of the first movie, as well as being a very natural route for Annie Potts's involvement in GB2020, and providing a heartwarming acknowledgement of the legacy of the Ghostbuster who's Crossed to the Other Side.
Now, do I expect this? No. Having the new characters "just" be some nieces/nephews/cousins of Egon is more what I expect, but admit that right now that idea feels like a bit of a letdown.