If you loved Batman Beyond: The Movie, try Superman: The Last Son of Krypton
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 Curt Geda, and they sit in Action / Animation / Science Fiction territory. If that's the register that drew you to Batman Beyond: The Movie, the second film will land in a comparable space — through a different lens.
What Superman: The Last Son of Krypton is
Here's a movie that understands the assignment. Mild-mannered Clark Kent uses his array of superpowers to become Superman. He then defends Earth. He does a pretty good job, all things considered.

