Re: The Joker's background?
It's alluded to in the movie that Joker doesn't really have a background. I mean obviously he is human and had to have come from somewhere, but he's made to appear almost supernatural in how enigmatic and, at times, omnipresent he seems. The best scene that illustrates this isn't even the multiple origin stories in my eyes, it's Gordon telling the Mayor what they have on him after Joker's been arrested, basically saying that he has no identity.
And on the pedestal these words appear:
"My name is Ozymandias, king of kings:
Look on my works, ye Mighty, and despair!"
Nothing beside remains. Round the decay
Of that colossal wreck, boundless and bare
The lone and level sands stretch far away.