 This films origin went back to 1990 with the concept Mothra Vs.  Bagan. The film would include battles all across Asia in places like  Shanghai and Bangkok. However, when Gojira tai Biorante (1989)  failed, Toho blamed the fact that an unfamiliar monster was used and  this project was put on hold to give Godzilla another shot with  Gojira tai Kingu Gidora (1991).