King Kong vs. Godzilla
"Ghidorah, the Three-Headed Monster" was rushed into production due to "Red Beard" falling behind schedule and a replacement was need for Toho's New Year's holiday slate. After the success of previous films where monsters were partnered up such as "King Kong vs. Godzilla" and "Mothra vs. Godzilla", producer Tomoyuki Tanaka decided to develop a film which would feature Godzilla, Rodan and Mothra.