If you loved Godzilla vs. Megaguirus, try Godzilla Against MechaGodzilla
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 Masaaki Tezuka, and they both carry the raw mood tag, and they sit in Action / Science Fiction / Thriller territory. If that's the register that drew you to Godzilla vs. Megaguirus, the second film will land in a comparable space — through a different lens.
raw
What Godzilla Against MechaGodzilla is
Tokyo Bay. Night. Distant thunder. A second Godzilla rises; the JSDF is routed. From the bones of the first, they forge Kiryu: a cyborg doppelganger. But the machine-monster remembers its past life. A product of its kaiju-saturated era, this is among the better millennium-series entries.

