Tomoyuki Tanaka
Director Yoshimitsu Banno was going to make a sequel to this film, but it was scrapped due to the fact that Tomoyuki Tanaka reportedly hated "Godzilla vs. Hedorah", so he fired Yoshimitsu Banno. The next film was going to be called "Godzilla vs. Redmoon", but this was scrapped and later became "Daigoro vs. Goliath", then they planned a new film called "Godzilla vs. The Space Monsters: Earth Defensive Directive", but this was also scrapped and then became "The Return of King Ghidorah", which was also scrapped, after which they ultimately made "Godzilla vs. Gigan".