Actually, the various empires that currently exist would jump at the chance to take a planet. If the Archive thinks the world has potential artifacts, they would destroy the current government and begin a search for the artifacts, that is if they resist anyway. The Japae would invade as they are an IMPERIALISTIC empire, the Relorians may have honor but they are in a situation were land is a precious resource, if it means conquering a neutral unallied empire, I doubt they would hesitate to save themselves. The Aralangs for all their morality and niceness are an imperialistic empire as well, although not as much this season.
This Galaxy is always at war red, although we may not constantly be in battle. War is here.
Although I do agree we need more planets, making some sort of rule were we cannot invade the planet is stupid. If a inhabited planet is created it will be attacked, if it's attacked by any empire with strength, it will fall. I wouldn't be surprised if it's attacked and invaded in the first topic, it's just how this damn RP works.