If you loved Batman: The Doom That Came to Gotham, try The Death and Return of Superman
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.
You already loved

Batman: The Doom That Came to Gotham
→
Try this next

The Death and Return of Superman
What they share
Both films are directed by Sam Liu, and they sit in Action / Animation / Fantasy territory. If that's the register that drew you to Batman: The Doom That Came to Gotham, the second film will land in a comparable space — through a different lens.
What The Death and Return of Superman is
You watch Metropolis as Doomsday descends. Superman clashes with the monster, even as the Justice League falters, but the hero falls. The world mourns. Animated adaptations let the source material breathe. Superman's legacy looms.