If you loved Pretty Cure All Stars DX2: The Light of Hope - Protect the Rainbow Jewel!, try Pretty Cure All Stars DX3: Deliver the Future! The Rainbow-Colored Flower That Connects the World
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.

Pretty Cure All Stars DX2: The Light of Hope - Protect the Rainbow Jewel!

Pretty Cure All Stars DX3: Deliver the Future! The Rainbow-Colored Flower That Connects the World
What they share
Both films are directed by Takashi Otsuka, and they both carry the playful mood tag, and they sit in Action / Adventure / Animation / Comedy / Fantasy territory. If that's the register that drew you to Pretty Cure All Stars DX2: The Light of Hope - Protect the Rainbow Jewel!, the second film will land in a comparable space — through a different lens.
What Pretty Cure All Stars DX3: Deliver the Future! The Rainbow-Colored Flower That Connects the World is
The franchise teams up once more, this time for a morale-boosting rescue mission. A rainbow flower must be regrown by a squad of magical girls before a dimensional rift widens permanently. It delivers exactly what you’d expect—nothing more, nothing less.