If you loved Mazinkaizer SKL, try Cyborg 009 vs. Devilman
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 Jun Kawagoe, and they sit in Animation / Science Fiction territory. If that's the register that drew you to Mazinkaizer SKL, the second film will land in a comparable space — through a different lens.
What Cyborg 009 vs. Devilman is
Akira meets Ghost in the Shell without the introspection. Cyborgs face demonic hordes. Action drives the plot.

