Godzilla | Mothra | Godzilla (1998 film) | Godzilla Junior | Super Godzilla | Godzilla vs. Mechagodzilla | Godzilla, Mothra and King Ghidorah: Giant Monsters All-Out Attack | The Return of Godzilla | King Kong vs. Godzilla | Godzilla vs. the Sea Monster | Godzilla: Unleashed | Godzilla: Monster of Monsters | Godzilla (film series) | Godzilla: Battle Legends | Bambi Meets Godzilla | The Luminous Fairies and Mothra | Steve Martin (Godzilla) | Son of Godzilla | Godzilla vs. Mothra | Godzilla vs. Megalon | Godzilla: The Album | Godzilla (Game Boy) | Godzilla (franchise) | Godzilla (comics) | Godzilla 2000 | Godzilla (1954 film) |
So the idea was dropped and Mothra was brought in as Godzilla next opponent for the film Godzilla vs. Mothra (1964).
Sekizawa also contributed screenplays to some of the most popular films in the Godzilla series from King Kong vs. Godzilla (1962), to Godzilla vs. Mechagodzilla (1974), including Mothra vs. Godzilla (1964).