Batman Beyond: Return of the Joker (PG-13)
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This is based on the TV series Batman Beyond. (It takes place apparently sometime during the third season of the show.) It was first released direct to video in 2000, with some edits. In 2003, an uncut version was released. I must have seen the edited version on VHS around the time it came out, but I'll be reviewing the uncut version, which I got on DVD in 2022. (Though I don't think my review would be any different if I were watching the edited version.)

So, it starts with Batman (aka Terry McGinnis) fighting a group of Jokerz who are trying to steal something high tech, which they normally wouldn't do. They include the Dee Dee twins (Melissa Joan Hart), Woof (who is a hyena-man, voiced by Frank Welker), Ghoul (Michael Rosenbaum), Bonk (Henry Rollins), and Chucko. It later turns out the reason they were after the tech was for their new leader, who is apparently the Joker (Mark Hamill). He has a pretty intense purpose for various pieces of technology that he's having the Jokerz steal for him, but I don't want to spoil what that purpose is. Meanwhile, Bruce Wayne is certain the person leading the Jokerz can't be the Joker, who he knows to be dead. Exactly how he knows this, he doesn't explain to Terry. But Terry later gets the story, in flashback, from Barbara Gordon. It involves the young Robin (aka Tim Drake) in a pretty dramatic way, but again, I don't want to spoil that.

And I guess I don't want to reveal any more of the plot, but of course the good guys win in the end. It's definitely a cool movie in a lot of ways, which I wish I could say more about without spoiling anything. But I can't.