"I can say without a doubt, that there are an infinite number of universes. Some are just like our own... but for one or two significant events, exactly the same." -Lex Luthor
It starts with everyone watching the news gasping in awe as they see the entire city of Metropolis has been nuked with the millions of people who lived there. You can here the echo of Joker's laugh coming through the door of the interrogation room.
Batman:The nuke! Where'd you get it!
Joker:Why? You want one? Copy-bat.
Batman attempts to hit the Jokers but the wall behind him suddenly explodes, revealing a very pissed off Superman.
Superman:Get away from him!
Batman:I'll handle this.
Superman walks toward Joker, tosses the table in front of him away, grabs Joker and slams him against the wall.
Superman:You drugged me! Made me... Lois... my son...
Joker: First, Krypton, now Metropolis. People you love tend to blow up, don't they?
Superman attempts to punch Joker as Batman says," Superman!" but hits the wall instead.
Joker:That's why I like you Superman. You're much more gullible than... (Looks at Batman with a smirk.)
Superman throws Joker across the room and Joker lands on a table, breaking it. Joker recovers, grabs a chair, sit down, and continues to mock him.
Joker: You think you can have a family, that locking me up would magically reform me, and they'll be safe. So big, yet so dumb. (chuckles) Now run along so I can break out of here. I've got lots of planning to top this.
Superman grabsgrabs Joker by tue throat as Batman walks to him and demands," That's enough!" and grabs Superman by the shoulder but Superman uses his super strength to shove Batman down on the floor and refocuses on Joker.
Joker:I know it's soon but... think you'll ever love again? Maybe you won't kill your next family.
Filled with rage, Superman rips out Jokers heart out (at least that's what most believe to have happened.) and Joker delievers his final laughter as a "so long" goodbye.