If you loved Naruto: The Lost Story - Mission: Protect the Waterfall Village!, try Naruto OVA 3: Hidden Leaf Village Grand Sports Festival!
A bridge between a film you've already seen and one most people haven't. Naruto OVA 3: Hidden Leaf Village Grand Sports Festival! has roughly 4.8× fewer votes than Naruto: The Lost Story - Mission: Protect the Waterfall Village! — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.

Naruto: The Lost Story - Mission: Protect the Waterfall Village!

Naruto OVA 3: Hidden Leaf Village Grand Sports Festival!
What they share
Both films are directed by Hayato Date, and they sit in Action / Animation territory. If that's the register that drew you to Naruto: The Lost Story - Mission: Protect the Waterfall Village!, the second film will land in a comparable space — through a different lens.
What Naruto OVA 3: Hidden Leaf Village Grand Sports Festival! is
Trying to corral rowdy kids into something resembling sportsmanship. Naruto spends the festival either running from his own digestive disasters or toward the finish line, whichever comes first. The one predictable thing? Someone will end up stuck in a giant pudding.