you're right, Broly is pretty powerful, and I was a bit mistaken. Superman was moving so fast he was breaking down the barriers of space and time, and Spectre stopped him before breaking the final barrier that would have destroyed the universe. He didn't technically destroy the universe, but if he hadn't been stopped, he would have accidentally. He did however, destroy a solar system with a sneeze.
Also, I'm just really annoyed at this entire RP, its full of one-lining auto-hitters. You can't just say "Broly went up and punched superman so far he flew off into space". Thats not how RP works.