If you loved Road to Ninja: Naruto the Movie, try Naruto Shippuden the Movie: The Lost Tower
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

Road to Ninja: Naruto the Movie
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Naruto Shippuden the Movie: The Lost Tower
What they share
Theyboth carry the foreign gem, playful mood tags, and they sit in Action / Animation territory. If that's the register that drew you to Road to Ninja: Naruto the Movie, the second film will land in a comparable space — through a different lens.
foreign gemplayful
What Naruto Shippuden the Movie: The Lost Tower is
You hunt a rogue ninja in ancient ruins, but then a powerful force sends you back in time. Minato Namikaze appears in this altered landscape. The film unfolds in a pre-series era.