If you loved Origin: Spirits of the Past, try EVANGELION: DEATH (TRUE)²
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
Both films are directed by Keiichi Sugiyama, and they both carry the surreal mood tag, and they sit in Action / Animation / Drama / Science Fiction territory. If that's the register that drew you to Origin: Spirits of the Past, the second film will land in a comparable space — through a different lens.
surreal
What EVANGELION: DEATH (TRUE)² is
You're a quartet of teens piloting bio-mechs in a war for humanity. But the trauma runs deep, and the Angels keep coming. Director Anno remixes the anime into something like a haunted, abstract recap. It lingers, a question mark.

