I think it would be cool if the Science victory actually involved building a Settler to put on that rocket and when you sent them off to the other planet, there was a second map. The goal wouldn't just be to settle there, but to establish a city of certain size or colonize a % of the tiles. That way if two or three players all landed on a foreign planet, there would be a final competition for winning, and maybe even some weapons you could fire from Earth to try to stop the Mars colony.