This guy was really, really boring overall, but let's see if we can hit some interesting highlights. Imperiex was the embodiment of entropy. He destroyed our universe repeatedly to create a new one from the ashes of the old, never quite satisfied with the new version and never willing to just say "It'll do." He finally got shoved into the Big Bang and realized that the imperfection he always encountered in the creation of the universe was his own future corpse. This basically means that the DC Universe has no more entropy in it. Or at least it didn't before Flashpoint happened and reset everything again. Good job, Barry Allen, you brought back entropy.