If you loved Dragon Ball Z: Summer Vacation Special, try Buddha: The Great Departure
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

Dragon Ball Z: Summer Vacation Special
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Buddha: The Great Departure
What they share
Both films are directed by Kouzou Morishita, and they sit in Animation territory. If that's the register that drew you to Dragon Ball Z: Summer Vacation Special, the second film will land in a comparable space — through a different lens.
What Buddha: The Great Departure is
Legendary Prince meets warrior origin story. Sheltered heir steps beyond palace walls after a starving girl and a dying swan change his worldview. Stripped of future, he picks a path no crown could wear.