* HilariousInHindsight: During "Reign of the Superman" a fan commented in his letter that "It's amazing how far comics have come in twenty years. Then Doomsday would have been some monster thrown from Krypton or something". When Doomsday's origin was eventually revealed, it turned out comics actually hadn't changed that much.
* LikeYouWouldReallyDoIt: Kill DC's practical {{Mascot}} permanently? Yeah, right.
* MoralEventHorizon: The destruction of Coast City. Mongul [[spoiler:and Cyborg Superman]] killed ''seven million people''.