Why da fawkz would I want a game set on a Ice death world with Pointy Earz and Humies dat ain't Diggas? Maybe it could be like Valhalla where it was a regular planet but was knocked off its axis and froze. Maybe cuased by a crashed Craftworld? They gotta adapt to the new ice death world or lose what's left of their people. Once they make a heaven, they make ranger parties to gather as much of the broken craft in the hopes of repairing enough to save the Infinity Circuit. What others could be on the planet? Maybe Tyranids? That would make the planet dangerous, an ancient hive ship sensing the Eldar's presence and wanting to use them to get off the planet. Or eat. They'd need vehicles to get around. A theme of Gorkamorka was Mad Max. What theme would this one have? Lost Planet?