The next film in the Godzilla Heisei series is the 1991 film Godzilla vs. King Ghidorah
Set in1992 (a few years after the events in Godzilla vs. Biollante), an author on books on psychic phenomena named Kenichiro Terasawa learns of a group of Japanese solders during World War II that were stranded on Lagos Island in the Pacific that were saved by a mysterious Godzillasaurus in 1944. One of those survivors, Yasuaki Shindo, would later become a wealthy businessman in Tokyo. Ten years later, this Godzillasaurus would be exposed to the hydrogen bomb that destroyed the planet and would become the Godzilla that surfaced in 1984 (in The Return of Godzilla).
Meanwhile, a UFO lands on top of Mt. Fuji. In it are three humans from the future: Wilson, Grenchko and Emmy Kano. They are joined by the android M-11. They bring word that they come 2204 in a time when Japan was wiped out due to Godzilla. They offer to go back in time to 1944 to remove the Godzillasaurus from Lagos Island to prevent it from becoming Godzilla. They offer proof of their time travel by showing them a book written by Terasawa that has not been written yet.
Terasawa, Professor Mazaki and psychic Miki Saegusa (previously seen in Godzilla vs. Biollante) travel back in time with the Futurians (as they are known) and help to move the Godzillasaurus to the Bering Sea. However, before they leave, the Futurians leave behind 3 artificial creatures known as Dorats. These creatures would fuse together during the hydrogen bomb tests to become King Ghidorah.
The truth would later be revealed that the Futurians wanted to hold Japan for hostage as in their future, Japan would be the dominant world power and they wanted to be the ones in control and would use King Ghidorah to help subjugate the Japanese. Emmy would side with the Japanese and along with a reprogrammed M-11 try to help the Japanese against Wilson, Grenchko and King Ghidorah.
Hope was thought lost that there would be no Godzilla. However, come to find out that there was a Soviet nuclear sub that sank in the Bering Sea where the Godzillasaurus was transported to which gave off enough radiation to turn him into Godzilla. So in essence, this was still the Godzilla that surfaced in Japan in 1984 and following. This would set up showdowns first between Godzilla and King Ghidorah and later between Godzilla and a Mecha King Ghidorah (with one of the heads being a robot head). The second battle would end with both Mecha King Ghidorah and Godzilla ending up in the bottom of the ocean. Emmy would return to the future but not before informing Terasawa that she was a descendent of his.
This film helped to tell an origin story for Godzilla, or at the very least an origin story for the Heisei Godzilla. Like many of the films in this series, Godzilla is not really an antagonist. Granted he does try to destroy Tokyo, but he also defeats a monster who is controlled by the villains in the film. It is interesting to see how time travel is brought into the picture and how it was thought that events were changed to have no Godzilla, there still ended up being Godzilla. Like I mentioned earlier, Miki Saegusa, appears in this film and helps to establish her role as the go to character for “psychic phenomena”.
Godzilla vs. King Ghidorah is in some ways a throwback to the old Godzilla films while setting it into a sense of modern day context (well at least the late 80s/early 90s).