Ancient Races... Should they be added as well???

Okay I was wondering if we should add ancient races such as the Eorna and other races (inside or oustside the Frontier) to give the galaxy more history. Should we go with the Revelation Space style of story where the galaxy was torn apart by ancient races who fought over the control of the galaxy. Maybe we can give it a name. Give reasons why the Sathar are the way they are (similar to the Inhibators who wish to exterminate life to prevent another war. The possiblilities are endless so give me some input on what you guys think we should do.