If you loved Kikaider Reboot, try Tokumei Sentai Go-Busters VS Kaizoku Sentai Gokaiger: The Movie
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

Kikaider Reboot
→
Try this next

Tokumei Sentai Go-Busters VS Kaizoku Sentai Gokaiger: The Movie
What they share
Theyboth carry the playful, uplifting mood tags, and they sit in Action / Adventure / Science Fiction territory. If that's the register that drew you to Kikaider Reboot, the second film will land in a comparable space — through a different lens.
playfuluplifting
What Tokumei Sentai Go-Busters VS Kaizoku Sentai Gokaiger: The Movie is
You're a Go-Buster protecting Earth from Vaglass. The Gokaigers return, now aligned with Zangyack remnants, seeking phantom Ranger Keys. But the pirates' motives are murkier than they appear. Shibasaki's entry in the Super Sentai series makes time travel a central gimmick.