If you loved River, try Doraemon the Movie: Nobita's Little Star Wars 2021
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.
What they share
Theyboth carry the playful mood tag, and they sit in Comedy / Fantasy / Science Fiction territory. If that's the register that drew you to River, the second film will land in a comparable space — through a different lens.
playful
What Doraemon the Movie: Nobita's Little Star Wars 2021 is
Apparently someone shrunk a galaxy-spanning conflict. Nobita finds a rocket with Papi, a tiny alien president on the run. It predictably gets chaotic.

