* DVDCommentary: The DVD release by Classic Media includes one by Steve Ryfle and a few others. It plays over and talks mainly about the American version, but it also talks about the Japanese version as well and how the movie in general compares to the original.
* ExecutiveMeddling: Paul Schreibeman is the reason why the ''Gigantis'' film became what it was, because he said the renaming of Godzilla to Gigantis ''[[{{Irony}} was to avoid confusion]]''. He even said the original title was "Angurius" when the original name is ''Gojira no Gyakushu'' (Godzilla Strikes Back). This blatant attempt to pretend this is not a Godzilla sequel made it laughable to the original films of the franchise.
** On Toho's side, Iwa Omori, the head of Toho Studios, told Tomoyuki Tanaka to make another ''Godzilla'' film after the success of ''[[Film/{{Gojira}} Godzilla]]''. Depending who you ask, it was the best or worst direct sequel.
* FollowTheLeader: [[UnbuiltTrope Sort of]]. Although this film marks the first time two monsters would fight each other in Japanese cinema, this doesn't mean the formula is anything similar to the [[Film/KingKongVsGodzilla film that really kicked off the "monster against monster" boom]].
* OldShame: Kaiju film regular Hiroshi Koizumi lamented that upon reviewing the movies he appeared in, including this film, he felt he hadn't realized his potential in them.
* RecycledScript: It's basically ''Film/Godzilla1954'' with another monster added in. However, since Creator/IshiroHonda was not involved in this film (he was directing a love story at the time), Shigeru Koyama wrote the script, with no alterations contributed from Motoyoshi Oda. However, [[NoPlansNoPrototypeNoBackup without the original means to defeat Godzilla provided by Dr Serizawa]], the Japanese are screwed.
* WhatCouldHaveBeen: Interestingly enough, ''Godzilla Raids Again'' wasn't intended to be merely dubbed and distributed. It was going to be called ''[[http://tohokingdom.com/cutting_room/volcano_monsters.htm The Volcano Monsters]]'' where Godzilla would be just a ''Tyrannosaurus rex'' and Anguirus to be an ankylosaurus (how they were gonna explain a T-Rex that clearly looks like Godzilla is beyond us). Godzilla (or rather the ''T.rex''), was to fight the ankylosaurus and [[ArtisticLicensePaleontology move to the North Pole to lay its eggs]]. While Toho decided to help by sending new suits and made a catalog of the production, the American company went bankrupt and the suits disappeared. So, ''The Volcano Monsters'' was ultimately cancelled. This explains why it took a whole 3 years and why it wasn't released in that form. Eventually, the film ended up being called, to the massive face-palming of Steve Ryfle (and his fellow commentators) and fans everywhere, ''Gigantis The Fire Monster".