Personally, I would really like new animals to fill the gaps in the ecosystems like large herbivores, feline carnivores, more water dwellers and some smaller creatures that can change the layout of the island a bit. But what I would like the most, as sort of a FINAL BIG update, would be a huge island that would take a very long time to explore. It would have every different biome, with savannah, grassland and jungle on the lowlands, and snow on the peaks. Then, a decent amount of ocean tiles. Maybe, every few days, a small whale, like a tiny whale island, could come and stay for a few days in the ocean, allowing you to get on its back for extra resources. Every single creature could spawn on this island, and there could be a few new ones in a new volcano or cave biome at the center of the island. Finally, there could be a true challenge mode implemented. It would not change the game a lot, but it would alter the behavior and abilities of all creatures, and make the game more of a challenge. There have been many cool ideas for a hard mode, like falling islands, invasive species that would try to take over the island, or making it so other animals can change their abilities over time and adapt to your nichelings. An update like this would be great for old players who need something to really freshen the game