If you loved Saint Seiya Heaven Chapter: Overture, try Dragon Ball: The Path to Power
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

Saint Seiya Heaven Chapter: Overture
→
Try this next

Dragon Ball: The Path to Power
What they share
Both films are directed by Shigeyasu Yamauchi, and they both carry the foreign gem, playful mood tags, and they sit in Animation / Fantasy territory. If that's the register that drew you to Saint Seiya Heaven Chapter: Overture, the second film will land in a comparable space — through a different lens.
foreign gemplayful
What Dragon Ball: The Path to Power is
Cell meets Cell without the tournament. An amnesiac Goku teams up with Bulma and Kame-Sen'nin to accidentally intercept the Red Ribbon Army's hardware upgrades. The fight erupts over sci-fi tech, not martial arts.