In The Batcave.
" You know Bruce, it struck me once I realised what I did in that delusion that Joker put me in, once I realised that I killed the love of my life and my unborn child, once Metropolis burned in nuclear fire, that this is not the first time that Joker did this ", spoke a dead voice.
" Mmmphmmmagh", replied a gagged one, the words meaning lost to the void.
" On that realisation all I saw was red, I wanted to kill Joker, sear his eyes, break his every bone, flay his skin, rip out his tongue then heal him and do that again and again and again and again. But I couldn't, it's not in me to be a murderer, it's not in me to take a life even after all that ", the dead voice continued.
All the voice got in reply was panicked rattle.
" All I ever wanted was to be human,Bruce, to love, to be loved, a family and to help where I can. For all my power, my greatest wish is to be just a man, not superman, not man of steel, not god. Just a man. Then Joker proved me just that, a man, powerless to protect what he loved, I failed just like many of Jokers victims before me. My family was destroyed just like so many before mine. I never understood this game you and Joker play, Bruce. I never wondered about the broken families and broken people left behind by Joker, the price of Jokers laughter. Gotham was your city, Joker was your problem, so I never wondered, felt like I would be stepping out of line and interfering with your business. Now, I want to demand justice for Lois, for my unborn child and for the millions of Metropolis. Then I feel like laughing and crying at the same time. Justice?What Justice? The one who committed the crime is insane, by the all civilized laws of men Joker couldn't be held accountable for what he did, he could only be sent to an asylum, to be treated for mental illness. Then what am I left with, Bruce, a dead wife, a dead child and a dead city that I failed to protect. I have defeated gods and monsters but a man broke me. But the question remains, if Joker isn't responsible for what he did then who is? Me, you, the system that produced Joker, Fate, Destiny? I don't know, Bruce. But what I do know is that, You, Bruce, have the intelligence, the money, the power, the influence and the skill to deal with Joker with in the law, if only you had the Will, you could have buried Joker so deep that he wouldn't have even been a footnote in history, yet you didn't, and I paid the price, millions paid the price. Don't get me wrong, I am not angry at you Bruce, I can't be, because I can't feel anything. I am already dead inside, I just need your help to finish what Joker started. You are the only one I know who is guaranteed to have some Kryptonite readily accessible, everyone else will take too much work, so here I am. Ah ha and there it is. You know, before now, even being in the presence of unshielded Kryptonite was agony, now, now, I feel nothing, I know True Pain now, now I know what soul crushing agony means. You know Bruce, since the first time I met you, I always felt like there is a connection between us. I want you to know, I consider you a Brother. Now let's get this over with, Lois is waiting for me, grant your brother some peace would you?", the man with dead eyes asked the frozen, shackled and gagged man who had a glowing green sword unwillingly shoved into hands, hands which aren't budging for all the considerable strength of the gagged man.
Then unceremoniously Superman impaled himself through the heart on a Kryptonite blade and was dead before he slid all the way through.
He died with a faint smile at the edge of his lips, with nobody to witness it except for horrified Bruce Wayne, who broke for the final time.