For the 2022 "Godzilla Day", a self-proclaimed day by Toho that aligns with the anniversary of Godzilla (1954), the company commemorated the 50th anniversary of Godzilla vs. Gigan (1972). This included releasing two short films online: Gigan Attacks (2022) and Godzilla vs. Gigan Rex.
The latter, Godzilla vs. Gigan Rex, is a CGI-animated short directed and written by Takuya Uenishi. It can be seen as a pseudo sequel to his 2019 short film that he submitted to GEMSTONE's Godzilla contest titled G vs. G. Unlike the fan film, though, Godzilla vs. Gigan Rex was officially funded by Toho.
Produced by Shunsuke Yanagisawa and executive produced by Keiji Ota, the short was released under the GEMSTONE brand. It features Godzilla facing off against an army of Gigans, including Gigan Miles (who appeared in the fan film) and the new Gigan Rex. The short opens with narration by Megumi Odaka, who played Miki Saegusa in the Heisei Godzilla series. Her lines are:
"Once there was a fierce battle. And a quarter of a century has passed since you disappeared. People forgot, but thought it was fine because it has been peaceful. ...but, here they come."
The six minute short was released online on November 3rd, 2022. Toho later made it available on YouTube, where it remains accessible. Below is the short.
Monsters
Godzilla
Gigan Rex
Gigan Miles
Background and Trivia
The original 2019 fan film, G vs. G, can be found on YouTube here.