Basically this is like the post WW3 game except it also has some focus on space? Count me interested. Although I'd suggest a slightly further back date (so people can have more freedom from present day politics) and a few guidelines on tech level to avoid confusions. Issues like eugenics and transhumanism could be also potential interesting topics here. Lastly you mention the potential of FTL but what about people living in space or in colonies in other planets? A Mars colony of sorts could be a fun addition, for example. Colonies have the obvious drawback of limited habitability and usually require trade with terrestrial countries to even feed their people but being in space is fun.