...Is the best animated DC related feature ever. It's based on the graphic novel by Grant Morrison & Frank Quietly which was even greater. The animated feature was a great adaptation, albeit slightly dumbed down from the comic. The animation was top notch (The characters are all based on Quietley's designs), the voice acting was stellar, & the story was epic.
I thought Batman: The Red Hood & Mask of the Phantasm had set the bar, but All Star Superman raised it.