This movie is a pretty fun time, but it helps if you're into Batman Beyond to begin with. I loved that show when I was in middle school and it was great to revisit it. I love this lithe, acrobatic, snarky take on Batman as a superhero, it's a little more Spider-Many than Bruce. And I love the very late 90s take on the future, where everything is neon and there's a lot of black leather. The animation's a little choppy, and the final reveal about the Joker's return is almost too weird and nonsensical, but I found the story leading up to it very compelling. There's even a bit of Harley Quinn, and best of all, Mark Hamill's Joker!
Obviously these two movies have a lot in common, both dealing with Batman's whole thing for taking in young boys, training them to fight, and then sending them out into the night in a brightly colored costume to wantonly attack armed criminals. This film is generally very dark, sometimes ridiculously so, but it has an interesting story and I was glad to know more about this comic arc that I'd heard about but wasn't overly familiar with. The action scenes are good, surprisingly bloody at parts, and I dug John DiMaggio's Joker even if it's not as iconic as Hamill's. All in all a strong animated feature.