If you loved Superman: Doomsday, try DC Showcase - Batman: Death in the Family
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Brandon Vietti, and they both carry the gut punch mood tag, and they sit in Action / Animation territory. If that's the register that drew you to Superman: Doomsday, the second film will land in a comparable space — through a different lens.
gut punch
What DC Showcase - Batman: Death in the Family is
You're Robin, and you locate your birth mother, but the Joker ambushes you. Batman arrives too late. Now what? The choose-your-own-adventure format, though gimmicky, suits this grim turning point in the Bat-mythos.

