If you loved Mobile Suit Gundam I, try Mobile Suit Gundam: Char's Counterattack
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 Yoshiyuki Tomino, and they both carry the epic, gut punch mood tags, and they sit in Action / Animation / Science Fiction territory. If that's the register that drew you to Mobile Suit Gundam I, the second film will land in a comparable space — through a different lens.
epicgut punch
What Mobile Suit Gundam: Char's Counterattack is
You command the Londo Bell fleet patrolling a tense solar system. Then a familiar voice returns with a plan to drop an asteroid on Earth. The film frames war as a tragic duet where old enemies converge on a single, inevitable stage.

