First teased in 2014's Godzilla movie, Mothra is finally joining the MonsterVerse - which represents a significant step for the shared universe as Mothra is one of the most popular kaiju/monsters in Toho's universe. While general audiences in the western hemisphere may not be entirely aware of Mothra's existence, her appearance in Godzilla: King of the Monsters should, hopefully, change that. Even though Mothra first appeared in the 1961 film, Mothra, 2019's Godzilla: King of the Monsters will be the first time that she will appear in a Hollywood film, as is the case with most of the monsters/Titans in the upcoming blockbuster movie.
Judging by the first Godzilla: King of the Monsters trailer, Mothra will appear in multiple forms in the upcoming film. It's unclear how that will work into the story and how far the movie expands, but it's also possible that Godzilla 2 will include Mothra's fairies as a way for Monarch to communicate with the Titan. Furthermore, coupling the fact that she's been a guardian angel to humans in the past with her God Rays superpower has resulted in Mothra being revered as the Queen of the Monsters in the MonsterVerse, which is why she's been closely associated with Godzilla. And considering that Mothra is also one of Ghidorah's enemies, it's plausible she will side with Godzilla against Ghidorah in Godzilla 2.
Unknown Monster: Possibly Kumonga
In the latest trailer, it was revealed that there are two more Titans appearing in Godzilla 2. It's been long rumored that there would be multiple, smaller monsters showing up throughout Godzilla 2 in order to greatly expand the MonsterVerse ahead of Godzilla vs. Kong in 2020; in fact, the sequel's official synopsis states that Godzilla vs. Kong takes place "in a time when monsters walk the Earth," which indicates that there are more than just a handful of Titans living in the world.
At about the 0:46 mark in the second Godzilla 2 trailer, a crab-like monster is shown coming from out of the ground (possibly from within one of the hollow points throughout the Earth). Although it hasn't been confirmed, it's widely believed that the monster in the trailer is Kumonga (aka Spiga), a giant, mutated spider that first appeared in the film, Son of Godzilla. However, despite debuting as a villain, Kumonga has occasionally sided with Godzilla himself, and it may do so again. Interestingly, the MonsterVerse has already seen a giant spider - in 2017's Kong: Skull Island - so there's already a precedent for Kumonga to appear in Godzilla 2.
Unknown Monster: Possibly Anguirus
Another mystery monster was teased in the second Godzilla 2 trailer, appearing at about the 0:57 mark. While viewers got a better look at the monster that could be Kumonga, all that fans have to go on for the second monster is that it has rock-like back since it's emerging from beneath the surface as well as the fact that it's quite enormous. Putting those two things together, in addition to the fact that Godzilla: King of the Monsters appears to be borrowing heavily from Godzilla's earlier films, it stands to reason that the second monster is Anguirus.
For those that don't know, Anguirus was the first monster to fight Godzilla, in the 1955 film Godzilla Raids Again. However, as Godzilla has become more of a heroic character over time, Anguirus has also sided with the iconic kaiju in several films. So, it's possible that Anguirus could appear in Godzilla: King of the Monster to either fight Gojira one more time or side with the Titan in his fight against Ghidorah. We'll just have to wait and see.
- Godzilla: King of the Monsters (2019) release date: May 31, 2019
- Godzilla vs. Kong (2020) release date: Mar 13, 2020