[Snowflakian]

That's the thing that bugged me in the 90s with playsets. Neon girders, and other wild colors, even toybiz did a mostly purple dangerroom/cerebro carrying case. Awesome idea but the colors being so flashy really knocked down the fun aspect and broke the imagination realism. Playsets don't have to be massive interactive and expensive, just accurate to the characters needs, and situations.

Take the amazing friends apartment for example. If done in 3 parts it could be reasonably priced, fully accurate, and should in theory fly off the shelves with the media push from the toon reairing. It'd be a perfect water tester for these things. As would a tony stark armory.
An additional factor that could help them sell, could even be amazing friends or other classic toons on a dvd that featured said hot zone. The problem is in going overboard with electronics that reallly raise cost on some items. But something simplistic, and accurate with multi-potential could really help.

Like the amazing friends apartment in my example. Now not only have you spread the cost out among three items that interconnect, but you've also opened the door for teleport mishaps, like in Jumper, or other powers media that may get kids attentions. Being just a simple apartment, it can go from the amazing friends, to Stark's Dorm suite, to more. Sure figures come first, that's a given. But the right playsets can push civillian figures much easier as well. It's all in how you balance them as opposed to going straight for the massiveness at first. If cost can remain reasonable, with the right characters especially, these things would be flying off the shelves outright. The biggest issue is that reasonable cost though. And I will admit, outside of the toybiz X-Men TAS dangerroom/cerebro, and the tmnt technodrome and sewer playset, most of my stuff came from flea markets where prices were far cheaper.

But if prices can get knocked down to the basic vehicle cost of 30 bucks, even packaged with sought after figures like female figures, or other rarities it could push them over the edge from obscure to highly sought after.

Tony Stark with his armory, Pepper Potts with tony's office that connects to armory, Amazing friends civillian IDs each with a chunk of the apartment, even the shield helicarrier would all outright do well, and be sought after by collectors and kids alike. Especially if kept to moderately accurate aesthetics of the toons or comics themselves, instead of neon colors. The same could be said potentially to an X-23 facility playset that included her in X-force garb, agent morales, kimikura, and two facility guards. Three female figures and a playset, and if made, I doubt you'll ever find it on the shelves.
Even if simplisticly made and at a 50-70 USD price tag.