5. A cultural assortment, perhaps happening through museums etc.: happening right now, but there's still space for MUCH MUCH MORE 
Absolutely, but there have been some beautiful sets recently: the Rijksmuseum sets, Van Gogh, the Greek Gods, ... One theme we are definitely missing is: an Aztec / Inca theme! Playmobil has a large Latin fanbase, they really should consider it!
But back on topic:
Worthless , if that was the case I’d have mountains (oh wait I do) ok many many mountains of playmo
I was more referring to the resale of the Victorian sets. Of course, the value of one's personal collection is always priceless! But what I meant is: at one point I will have the option to buy completely new parts (and sets) from Playmobil or buy secondhand parts (or sets) from a reseller. Believe me, I will definitely go for the new parts from Playmobil. Unless the resellers reduce their prices with at least 75% and this is what I mean with "(almost) worthless" in my earlier
post. For years the resellers had like a monopoly on the Victorian sets and it seems some are getting nervous for obvious reasons

I guess in the end this also might have played in the decision of Playmobil the revive those iconic sets. If you see that resellers can ask 3x or 4x the price of the original product (and every week new mansions pop up on second hand websites): those are lost incomes for Playmobil itself. If you can bring the same product again on the market for a cheaper price, collectors and normal customers will definitely buy the new stuff.