If you loved Mobile Suit Gundam 00 The Movie: -A Wakening of the Trailblazer-, try Mobile Suit Gundam 00 Special Edition I: Celestial Being
A bridge between a film you've already seen and one most people haven't. Mobile Suit Gundam 00 Special Edition I: Celestial Being has roughly 3.5× fewer votes than Mobile Suit Gundam 00 The Movie: -A Wakening of the Trailblazer- — 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.

Mobile Suit Gundam 00 The Movie: -A Wakening of the Trailblazer-

Mobile Suit Gundam 00 Special Edition I: Celestial Being
What they share
Both films are directed by Seiji Mizushima, and they sit in Action / Animation / Drama / Science Fiction / War territory. If that's the register that drew you to Mobile Suit Gundam 00 The Movie: -A Wakening of the Trailblazer-, the second film will land in a comparable space — through a different lens.
What Mobile Suit Gundam 00 Special Edition I: Celestial Being is
You wake in 2307 watching war machines circle the sky and join them as a mech pilot caught between ideologies. Then your faction splinters and your enemy recruits you. The series strips its own footage into a leaner orbit, tightening the politics of a fragmented future.