Points of Interest
Half of the planet is an industrial wasteland, and the other half is a paradise planet inhabited by both humans and intelligent animal life. Surrounding the entire quadrant is something called the Galacian Wall which was designed to keep the inhabitants in and all others out.
Incredible Hulk #271 (1982)
Somewhere in the Keystone Quadrant is a strange little planet called Halfworld. The planet is divided almost completely in half by two completely different environments. One side consists of an industrial wasteland once inhabited by robotic beings that constantly made machines even though they couldn't use them once they were constructed. On the other side of the world, humans, formerly called the Loonies, coexisted with intelligent animal life that used the machines the robots built.
The animals cared for and entertained the Loonies, but when a Toy War broke out on the planet between Judson Jakes and Lord Dyvyne, all life on Halfworld was in jeopardy. Fortunately, Rocket Raccoon and his first mate Wal Rus were on the case. They not only found a way to cure the mental instability of the humans, with the help of Uncle Pyko and Gideon's Bible, but they managed to give the humans a world to thrive on after defeating Jakes and Dyvyne. The humans wanted to continue a mutually beneficial relationship with the animals, but Rocket and many of the other creatures left the planet on a giant spacecraft shaped in humanoid form that the robots built.