Jet Jaguar vs. Megalon

Jet Jaguar vs. Megalon ジェットジャガー対メガロ (Jetto Jyagā tai Megaro) is an unmade 1972/1973 film.

Plot
A giant insectoid-like deity dubbed Megaloman appears in Japan and begins causing destruction, but it stopped by a humanoid robot named Jet Jaguar.

History
After a young Japanese boy won a contest Toho had in mid-to-late 1972 for fans to come up with a new hero for them to use with his creation "Red Alone", the hero was renamed Jet Jaguar and set to appear in a film where he battled Megalon. However, Toho figured Jet Jaguar would not be able to carry the film on his own, in screen appearance or marketing value, so during pre-production, the project was shut down for several weeks, until screenwriter Shinichi Sekizawa was called in to rewrite the script to add Godzilla and Gigan. The resulting film, Godzilla vs. Megalon, paired Godzilla with Jet Jaguar against both Megalon and Gigan.