When asked about the apparent height difference between Godzilla and Kong in 2018, Adam Wingard said "They gave us a good out in Kong: Skull Island (2017) when they mentioned that Kong is still growing, but that'll be a challenge we have to deal with, and we're very aware of that issue."
Jia is a deaf Iwi girl portrayed by Kaylee Hottle, who is from an all-deaf family. The auditions for the character came down to a handful of deaf actresses, with Hottle impressing director Adam Wingard the most, making it clear she was a professional. He tried making her laugh at one point by attempting Michael Jackson's Moonwalk, "and she was just completely deadpan." He learned then to let her do her thing and "just stay out of her way." Wingard took three months of sign language lessons but was incapable of grasping it. He ended up using an interpreter alongside Hottle to avoid embarrassing himself.
The film takes place five years after Godzilla: King of the Monsters (2019), and 51 years after Kong: Skull Island (2017), which took place in 1973.
Adam Wingard explained why the movie's runtime is a little less than two hours. He stated that this is on purpose, telling Variety that he prefers to keep his films under the two-hour mark. The director also said that if Godzilla vs Kong were to run for three hours, it likely wouldn't include an additional hour of the Titans duking it out. He stated; "A lot of the fans online were all asking me is this going to be a three-hour film? When it was announced that it was a little under two hours they immediately thought when is the director's cut coming out? I like movies under two hours. I think if you do a movie over two hours, you better have a damn good reason for it to be that long. At the end of the day, if you're going to make this movie into three hours, you're not going to get an extra hour of monsters fighting. You're going to get an extra hour of people talking about monsters."
Director Adam Wingard suggests that Godzilla is not for a second worried about losing against Kong and is instead merely playing with the big ape. "Look at him, he's smiling right here. He's having fun! Kong is not having fun." after the first battle.