Imagine that you have a empire set up, colony's established and upgraded nicely. It's time to start exploring your planets for any goodies you can get your hands on. When one of your planets finishes exploration, instead of the usual message you get "Contact with a colony has been lost!"
You have a "oh crap" moment thinking it's been taken over or something so you send in scouts to investigate, but you lose contact with those as well. Just when you are about to send in the defense fleet you regain contact with the planets orbital structures, but your colony is gone....
Another scenario, you happen to leave a frigate beside a dead asteroid or space junk for a while. When you decide to move the frigate it doesn't respond. You scratch your head and just then it starts acting on it's own. It heads to the star where you watch (assuming you sent a scout to follow it) it jump to another star, in the opposite direction of any in the game.
Or perhaps something like the UFO in X3, you see it flying through your planets gravity well but it disappears.
If you want to get real interesting, through in a "Beast" infested ship in one of the space junk belts that can infect ships passing through and quickly get out of control until your waging a losing battle against your own ships. Make people terrified to explore the dark corners of the galaxy.
These are some ideas off the top of my head. Got the idea of this from the thread "Space is kind of boring.", which as the title suggests is kind of boring at times. Easter eggs like space ponies is fine and, but i want some true "WTF?" moments. Something that will keep me on the look out for the unexpected.
I have no expectation to see this in a patch or anything. A expansion pack at the least, perhaps someone will make a mod eventually (if it's possible). So what do you guys think? How much enjoyment would some truly bizarre events give you? Would you want to face something for which you are totally unprepared?