If you loved Sailor Moon S the Movie: Hearts in Ice, try Sailor Moon SuperS: The Movie - Black Dream Hole
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.

Sailor Moon S the Movie: Hearts in Ice

Sailor Moon SuperS: The Movie - Black Dream Hole
What they share
Both films are directed by Hiroki Shibata, and they both carry the cozy, foreign gem, playful mood tags, and they sit in Action / Animation / Fantasy territory. If that's the register that drew you to Sailor Moon S the Movie: Hearts in Ice, the second film will land in a comparable space — through a different lens.
What Sailor Moon SuperS: The Movie - Black Dream Hole is
You’re a child in Tokyo who starts dreaming of a castle that grows hungrier each night but no one else remembers the dreams. And then your classmates vanish one by one while the sky over Shibuya fills with an unnatural dark star. Like 1995 anime, the film leaves its final shadow wrapped around the playground, long after the credits.