"Flash: So much for heroes. Brainiac had barely hit the floor when the arguing started. Should we kill him? Keep him alive? I couldn't watch them go to war. Not again. So I ran -- into the speed force! Brainiac wanted the universe to himself, so I dropped him off at the end of history. But I still kept running. I needed to be alone. Then I heard a familiar voice... It was Jay -- and the other speedsters! A crisis is coming, he told me! But if we run fast enough, together, we just might save the Multiverse. I thought I'd been running away. But I was running toward something. It's good to believe in heroes again."
January 1, 1970
https://en.wikiquote.org/wiki/Injustice_2