If you loved The Fantastic Adventures of Unico, try Saint Seiya: Warriors of the Final Holy Battle
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

The Fantastic Adventures of Unico
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Saint Seiya: Warriors of the Final Holy Battle
What they share
Theysit in Animation / Fantasy territory. If that's the register that drew you to The Fantastic Adventures of Unico, the second film will land in a comparable space — through a different lens.
What Saint Seiya: Warriors of the Final Holy Battle is
You awaken in a marble temple as Lucifer’s cloaked figures slash through the last Gold Saints. Athena slips out alone to bargain with him and you watch her vanish, then sprint to intercept. The camera rotates around a statue as wings spread over a ruined altar.