If you loved Arion, try Mobile Suit Gundam: Cucuruz Doan's Island
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 Yoshikazu Yasuhiko, and they sit in Action / Animation territory. If that's the register that drew you to Arion, the second film will land in a comparable space — through a different lens.
What Mobile Suit Gundam: Cucuruz Doan's Island is
You pilot a mobile suit in a covert mission gone wrong, and then enemy forces attack, but the director Yoshikazu Yasuhiko leaves you with a desperate escape.

