If there is, they're hiding in the permit-locked regions. I seriously doubt there's anything new and amazing buried deep in unexplored space that a player would just stumble upon, because chances would be good that no-one would ever, ever stumble upon it, and that would be thousands of programmer-hours wasted for nothing.
If they make anything and bury it out in deep space, they will eventually plant "clues" somewhere in the game, to push people towards finding it.
Jumping around randomly might find some extreme-edge improbabilities the Stellar Forge has created (like Glowing Green Giants), but almost certainly not new hand-crafted things like alien civilizations.
This is, of course, the opinion of one player with near-zero programming skills and even less inside knowledge of Frontier's programming culture. It is certainly possible that I am wrong. It just doesn't seem likely, to me.