10 Times Superheroes Defeated Themselves
9. Batman And Superman Fight Owlman And Ultraman - Superman/Batman Annual #1
Providing two for the price of one, 2006's Superman/Batman Annual brought us the sweet joy that was seeing DC's biggest superheroes fight their evil doppelgangers.
Given that Batman and Owlman don't get a chance to fight in any of their other encounters, the comic is an undeniable delight, combining both a badass battle and some good comedy to create something that feels genuinely special - aside from one or two jokes that have aged unimaginably badly.
After beating Owlman down and using Ultraman to save a ship of innocent civilians - which he appears horrified at - the villainous pair are sent back to their universe, leaving Batman and Superman to hide their secret identities from Lois Lane of the rest of the saved ship in relative peace.