Maybe the next series, plot-wise, should focus on the center of the galaxy. For some reason, humanity has some interest in heading toward the galactic core that I don't think is well-explained. And the megaroad 01 was lost there, adding to the mystery. But I'm not quite sure as to what sort interesting things are to be found. I don't think there's anything wrong with going back to a colonization ship setting, although 7 and Frontier already were quite imaginative regarding setting.