What would happen if you scale up particle colliders by orders of magnitude? Even the FCC at 32 km diameter doesn't seem big. Think of a 1000 km diameter collider e.g. in Australia. Or a giant lane-keeping-sattellite swarm in space where a vacuum tube might not be required.

LHC has 14 TeV and already creates temperatures that we think didn't naturally occur anywhere in the universe since the big bang. FCC will have 100 TeV. What is expected in 10,000 TeV collisions? Or 1,000,000,000 TeV collisions? What does the standard model say would happen? Can we break our universe or create a new one? Or will it be totally unspectacular and just a bigger boom and nothing new would happen?