The obvious implication of this hint was that it had to do with Mechagodzilla.
AnotherKing of the Monsterstease that didn’t play out the way many expected was Mothra’s return.
However, that was not the route it took to bring Mothra back.
Instead,Godzilla x Kongusedthe Hollow Earth worldto bring her back into the picture.
It could be that Monarch used its studies of Kong to further its work on the project.
In Godzilla: King of the Monsters, crypto-zoological agency Monarch faces off against a battery of god-sized monsters known as the Titians. Among these creatures is the mighty Godzilla, who collides with Mothra, Rodan, and his ultimate nemesis, the three-headed King Ghidorah.