I am currently reading the book series The Expanse (Look there for lore and background knowledge). It is also being adapted into a TV series on SyFy, and I thought it would be a cool NRP where people could create a person maybe in the UN, Mars Government, or the OPA. Then maybe after we had leaders for the major factions, extra people could join in as stations, moons, or ships. The story line would not follow the book series, but instead use the setting at the beginning of Leviathan Wakes (The first book in the series excluding prequels) where tensions are heating up and wars could be a thing. This is, as you guessed, just an interest check. If there are enough people wanting to play I will start working on the NRP aspects along with the application sheets.