I thought the rest of your overall universe was still pretty different from the OTU, considering here?:
When would you date your setting generally? Is it hundreds or a thousand or so years in the future?
Humans: With respect to human types, there are no Zhodani (two human groups modified by the Ancients is one too many, plus I am not a fan of psionics at all as used in the game), and no Sword Worlders as depicted in canon (regretfully, but I cannot get a bunch of Icelandic-speaking Terrans to the Spinward Marches in any sort of comprehensible way).
There is something calling itself the Imperium centered on Capitol in what is called the Core Sector, with an effective radius of control of about 30 parsecs. There is another Imperium centered on Vland, which contests control of the intervening space with the Core Imperium. The Vland Imperium very much concerned with racial purity, and views any Solomani blood as contamination. DNA testing is mandatory.
The Spinward Marches are just that, the frontier area. Lip service is paid to Vland, but no effective control is possible, and the March worlds pretty much view the Imperium as something so far away as to be meaningless. Local confederations of planets exist, and you periodically have someone try to transform one of them into an Empire. That is not viewed with favor by the overall community.
The Terran Confederation is centered on Terra, and also has effective control out to about 30 parsecs or so. The Imperium never conquered Terra, and disintegrated in the attempt to do so. The Terrans have fanned out throughout what canon calls the Solomani Rim, settled by various groups seeking to run their own affairs. Think of planets called New Texas, New Quebec, New Alaska, New Boston, New Berkeley, etc. I can put the Icelandic-speaking Sword Worlders in this area, roughly between the Terran planets and the Aslan area, happily raiding both.
When would you date your setting generally? Is it hundreds or a thousand or so years in the future?