I'm really struggling to think of
any theme that would justify 200+ pieces, have some of the more standard "scenery" items (e.g., wall/roof set),
and would have broad appeal though. There's plenty of scenery gaps but nothing that feels essential as far as a region-focused DLC is concerned. And, again, I'm focused on broad appeal here. What would the most amount of players from all over the world want? I'd love a Rustic New England Scenery Set because it would help me and my builds but... That's not a fair request, y'know?
So what I'm kinda hoping for is a general worldwide animal pack with, say, anywhere from 8-12 species in total. Probably skewing more toward LA/SA than any other region but with at least half the pack for other animals worldwide. And... "It's not just the animals that are going worldwide! This new pack will give you access to 60+ scenery items to decorate and theme your zoos wherever your zoo might be!" I'm thinking pretty general here. And pieces that might already add onto existing content, or that may have been scrapped from earlier packs. More temple rubble. Those long-lost Southeast Asia Animal Pack signs. Hotwire. A few pieces of new foliage. A new editable sign or two. New mesh pieces. Parking lot lines. New railings. Simple things that don't hinge on cultural research and are pretty consistent worldwide.
And for the free update? Maybe a scenario editor. Those binocular things so that guests can see animals better from afar. Flexicolor versions of existing content. Scaling is my dream here but I've given up on that one at this point. Hah.