If you loved Gurren Lagann The Movie: Childhood's End, try Gurren Lagann the Movie: The Lights in the Sky Are Stars
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.

Gurren Lagann The Movie: Childhood's End

Gurren Lagann the Movie: The Lights in the Sky Are Stars
What they share
Both films are directed by Hiroyuki Imaishi, and they both carry the foreign gem, playful mood tags, and they sit in Action / Animation territory. If that's the register that drew you to Gurren Lagann The Movie: Childhood's End, the second film will land in a comparable space — through a different lens.
What Gurren Lagann the Movie: The Lights in the Sky Are Stars is
You man a salvaged mecha in a rebuilt valley where kids race to the surface each dawn. One twilight the Anti-Spiral erases entire cities with a single motion. When the all-clear never rings, the same ragtag pilots from Teppelin reboot their cockpits. Even the sky feels like yesterday’s star map again.