And DST is in a tough situation especially dealing with Sony. Before the Sony email leak there was another "leak" that got Sony upset. Sony was teasing what Venom would look like in Spider-man 3. What didn't seem to occur to anyone in marketing was the number of Venom toys that were coming out. Action figures. Banks. Sculptures. They all gave away Venom's look. Sony probably learned from that so they may be waiting to the last minute to give any sort of okay to DST for GB20 figures. And until then DST themselves probably don't know what to do.
This assumes that te reason we have not seen new figures yet is because they are based on the GB20 movie. Considering how early that project is in production, I don't think that is the case. For one, I don't know if the GB license automatically grants them access to GB20. Also, with the RGB stuff being so popular I would think the next fews waves would be RGB based.
All I know is that I want more ghosts and less Ghostbusters. The first set of figures was pretty good with this. We got the 4 GBs, 2 variants, Peck, Janine, Dana (Zuul) and Luis (Vinz) 10 humans and 5 ghosts (or 6 depending on how you view the terror dogs). We got Gozer, Slimer, Terror Dogs, Taxi ghost, and Library ghost. That's a good mix.
The next round of figures was a lot less balance. We got 4 more GBs with new heads and gray suits, Luis as a GB, then 2 variants with slime blowers. We got Janosz and then Vigo... and that was it for GB2. 7 variations on the GBs (including Luis), one human "villain" and the only "ghost" is a human. At least Gozer looked demonic, but Vigo is just a guy. No ghosts made an appearance, apparently for license reasons. Then we round out the fire house line with 4 more GBs, though in animated style, a cartoon Slimer and a cartoon StayPuft.
For this line to go on, they REALLY need to get those ghosts out there. In particular they need to get the movie ghosts IMO. ILM seems t hold the rights to the GB2 ghosts, but what keeps us from getting the Subway ghost? Also, I hope they worked out the issue with ILM so we also get the Theater ghost, jogger ghost, an updated Slimer from GB2 with the new smaller arms, the Scoleri Bros. These are huge holes in the line that I really hope they fix.
I think they hit the limit of how many GB variations they can do without giving us more ghosts. Sure, they can still do court room versions, commercial versions in the lab coats, and even casual clothes versions, but those will get old fast without more ghosts.