Sure. I've had similar ideas myself. I would have loved to seen a 60s satire/commentary on the way Blacks/minorities were treated in the 50s and 60s by having our heroes discover a humanoid settled world with the exact opposite racial demographics and political/socio-economic structure. Black people are the majority and oppressing the whites.
Kubrik could had made a good movie about that. Blacks from this Earth choosing to become opressors or help the white civil rights movement would had been an interesting dilema.