Space Station Silicon Valley. I would be happy with just a VC port, but the idea has a huge amount of untapped potential. There were some ideas discussed in early interviews that didn't make it into the game but could add a lot to a sequel, like robots changing between different forms with different abilities, more interactive environments that could be used (for instance an interview mentioned rolling snowballs around to make them bigger in order to trap a fleeing penguin so it could be taken over).
There are also potential for a lot more robot animals with a new abilities, for instance" a hawk with high-speed jet engines, a spider that could walk on walls and ceilings, a mole with a drill on its head that can dig through the ground, a dolphin with propellers and a spike on its nose for ramming, a mantis with buzz saws on its front legs that can cut down bushes and trees, a bat that uses sonar (turning the screen black-and-white but letting you see invisible things and see in the dark), a flying fish that can transition between swimming in the water and flying through the air, a remora with a magnet cup on its head that can attach to other fish robots or machines in the environment and use them to get through strong currents or sneak through defenses, and a jerboa with a rocket boost that can jump really high.
There is also potential for new environments, like dark areas that require animals with special abilities to navigate (bats for echolocation, owls for good night vision, dogs for smell), areas with wonky gravity (no gravity, changing gravity, different gravity in different parts).
There could also be rouge enemy microchips or viruses that compete for robot animals and change their behavior.