My idea for the sequel is that the empires now would be devastated by some event and left on their own respective homeworlds (Or maybe even a mutual planet if you guys want that) with some key technologies lost, but others intact. It could be a couple thousand years before they rediscovered FTL, and the other species would become myths along with the wars of the current RP. However, this wouldn't simply turn back the clock on all of the empires and shove them back into the 21st century, it would leave the many species behind. Lakfakalle (The planet I would leave developed for my empire if we did this sequel) would still be populated by all the species of the Federation, with all the cultural situations that entails. It would create a much more exotic environment, and we wouldn't have to destroy history for it!