Alright, here's a hypothetical scenario for ya'll to chew on:
Gotham City: DC America's sewer. As it happens every couple of months or so, crime is on a massive upswing. Worse, Lex Luthor, The Joker, The Penguin, the Riddler, and Bane have formed something of an unholy alliance, bent on plundering the city. Only three people stand in their way: Batman, Superman, and Robin.
But not the people who normally answer to those names.
Yes, folks, it's the Reign of the Supermen/Who Rules the Night ultimate ultraviolent vigilante fragfest! First, let me introduce our Superman: The Eradicator!http://en.wikipedia.org/wiki/The_Eradicator
Next, our Batman of the hour, the Angel of Vengeance Himself:
Jean Paul Valley!http://en.wikipedia.org/wiki/Jean_Paul_Valley
Finally, Batman's biggest failure, the Boy that Didn't Live...and then Did Again For Some Weird Reason: Jason Todd as Robin!http://en.wikipedia.org/wiki/Jason_Todd
The Eradicator appears as he did during the Reign of the Supermen storyarc, goggles and all, and behaves accordingly: among other things, he does not know that he isn't Superman. Valley is equipped with the armored bat costume he developed for his final fight with Bane, thus the blue one with the cape (and not the blade-wings). Jason is pre-Death in the Family, and wears the standard Robin costume accordingly.
So, can the World's Angriest Imposters triumph? Can they go the week without killing eachother? Will they stop the Alliance of Evil from taking over Gotham? Will they destroy Gotham on their own anyway? Let's get ready to RUUUUUUMBLLEEEEE!