There were several more empires in playtest form that were not in E2 including the Atreans. Last time he was on the BBS Francois mentioned he had reorganized things and would drop/merge some of the empires. However it's been almost 20 years since E2 was published so what we have now may well be what we get.
I do believe Petrick mentioned having some more empires from Francois. What state they are in only Petrick knows, but I suspect they are to the same standards as the published ones.
Speaking of E2 talk, does this bulletin board have a section talking about custom campaign reports? Just wondering.
I ask because sometimes I wonder if I'm dealing with altenrate areas of space that I have no clue what/when/where or why I'm here. Its like being lost in cyberspace I guess.