This. I recall a Flash video from back in the day that showed the relative scale of things in the universe, from the largest known cosmic structures like galaxy clusters, right down through macroscopic/human scale stuff, to the smallest known sub-atomic particles. All that was pretty well populated, with known objects present at almost every order of magnitude. However, if you continued zooming in there was then... nothing. Many, many orders of magnitude with nothing known at that scale until you arrived at the Planck length and hypothetical "fabric of the universe" type stuff.
It seems highly unlikely there's absolutely nothing there, but the kind of equipment we'd need to explore that far down into the foundations of the universe is way, way, beyond anything we might even dream of today. While this proposed collider might get us a few more orders of magnitude down from the LHC, there is still clearly a *looong* way down still to go beyond it's capabilities. You've got to start somewhere though, and that knowledge can then drive the designs for the next generation. Or maybe we could just cut to the chase and sub-contract the construction job out to the Magratheans?