Free idea for all the AAA game studios:
We yearn to be Creatures.
Give us an MMO game where you can choose to be one of dozens of animals. I'm talking mammals, reptiles, birds, rodents, even bugs! Every animal would have its strengths and weaknesses, and gameplay would simulate a reasonably balanced and realistic ecosystem. (Animals that die quick but proliferate fast could have quick respawns + grow time, for instance)
But put as much of an emphasis on the social aspect of it, the accuracy of animations, and actions you can do! We don't want just combat, we want to be able to communicate with each other (without text!) and just vibe, too. Give animals a wide variety of actions to do that aren't just fictional, but can solely be for communication! Let us groom friends, roll in dirt, claw up trees, scratch our ears, make different vocalizations. Let us interact with flora, dirt, rocks. Let us utilize specialized abilities like enhanced senses, camouflage, defense tactics!
We yearn to be Creatures.
Give us fun and interesting areas to explore that's full of activity and interaction. Little nooks and crannies, creeks and springs to find, trees and rocks and things to climb, caves to build nests in, areas to claim as territory.
Also important: Peaceful and/or co-op modes where players can't hurt each other, and most other animals are NPCs. Give players the ability to just play with friends. Recognize that a huge amount of kids and adults enjoy role-playing!
Give us diverse biomes, massively different gameplay styles, ways to customize our animals with realistic (or slightly unrealistic) patterns and colors. Let us grow from babies to adults, explore different ways to achieve different stats. Think The Isle, Path of Titans--but more. Playing animals that have smooth, well done animations is something big game studios don't realize scratches the brains of a massive number of people.
Optionally, imagine all of this, but in an alien world full of speculative biology, created by a team led by actual biologists, astrophysicists, geologists. People who know animals, plants, understand evolution and the anatomy of ecosystems, of theoretical environments.
WE YEARN TO BE CREATURES!!!