With a net budget of $135 million, this is the cheapest MonsterVerse film to date. The filming process was more streamlined than the previous film, Godzilla vs. Kong (2021), which had many extra scenes that were filmed (additional character development, lore expansion, and action scenes) but which were ultimately cut from the final film. Director Adam Wingard also cited more experience with the VFX process.
The image used for the blueprint of the B.E.A.S.T. Glove is the arm of the Círculo de Fogo (2013) jaeger, Gipsy Danger. According to director Adam Wingard, the B.E.A.S.T. Glove was created to boost the sales of Kong toys. This also played into the 80's toy influence Wingard wanted for the film.
Godzilla's movements and mannerisms namely the scene where he's sleeping curled up inside the Roman Colosseum, were based off of director Adam Wingard's cat 'Mischief.'
Director Adam Wingard pitched the Mini-Kong to the studio as the Monsterverse's "Baby Yoda". Although its name is never mentioned in the film, the Mini-Kong is called "Suko", which was first revealed on the toys and merchandise. It carries significant meaning, as when written phonetically in Japanese, it can be broken down into two characters that ultimately mean, "Essential Child." Interestingly, Suko is typically a female name in Japanese and, perhaps coincidentally, is a Filipino word for "surrender."
The change in color for Godzilla's atomic breath going from light blue to a pink tint, signifying a total boost in power, is identical to the Heisei incarnation having the far more destructive Red Spiral Ray as the sheer strength of his attack is more powerful than his default blue-colored atomic breath. In the Heisei series, Godzilla was nearly defeated by Super Mechagodzilla after the machine destroyed Godzilla's second brain. It wasn't until Fire-Rodan sacrificed his energy to Godzilla, at the behest of his adoptive brother Baby Godzilla, that Godzilla obtained the Red Spiral Ray and was able to make short work of Super Mechagodzilla. Just like the Heisei series Godzilla is obtaining a power up to face more powerful foes, in this case Skar King and Shimo.