In a way, this is directed at Mattel, but it can also apply to other companies... Hasbro, Playmates, Jakks, Jazwares, even ridiculously expensive Super7.
I saw these online... probably buying them online, because buying them from Walmart in Puerto Rico is ludicrously expensive. The Ice cream shop is at $33-ish at Walmart. With taxes it's almost $37. Online, plus shipping and taxes ends up like $26-ish... but I digress, the point is that even at the higher Puerto Rican price, it's a mini playset.
Big companies could take a page out of this and take advantage of "small dioramas with play elements". Of course, I'd expect these hypothetical small playsets dioramas to be a bit more expensive, due to scale. Both Miniverse and its competitor Minibrands tend to be all over the place here. But the principle is similar:
Small modular playsets that can be made larger. I know I mentioned somethingnlike this exclusively for TMNT, but now I'm talking in general. Like Backstage for WWE, alleyways for Superheroes... DC could deliver a Crime Alley Playset like this... a $120 4pack with Diorama:
The Waynes and Joe Chill. In addition to the diorama. The Turtles could get alleyways, Technodrome interiors, He-Man could get Grayskull, Snake Mountain, and Eternos interiors... that's sticking to Mattel.
Hasbro can make Danger Room Dioramas with this modular idea. Arcade Murderworlds, Star Wars could benefit from this. GI Joe Classified could benefit from this.
Playmates can do various settings throughout Angel Grove... Or... the best part ever:
Zord battle dioramas.
If they want to go cheaper (please don't) cardboard to the rescue.
Smaller companies can enter the game too and make small generic playsets/dioramas.
I'm gonna try and get one... guess which one it will be: