Ever since I first read Frank Miller's The Dark Knight Returns I have wanted to see this showdown on the big screen.
My favorite line in any comic book at any time to this day remains the words uttered by Batman near the end of his fight with Superman when he says:
"You're beginning to get the idea, Clark. This is the end, for both of us. We could have changed the world, now, look at us; I've become a political liability, and you, you're a joke." And as Batman really starts slugging him, he says, "I want you to remember, Clark... in all the years to come... in your most private moments... I want you to remember my hand at your throat... I want you to remember the one man who beat you".