This is not the first tease to Mothra in Godzilla: King of Monsters, which was titled Godzilla: King of Monsters but it appears that the title may have been abandoned since.
Mothra took off once she started showing up on screen with the King of the Monsters in movies like Mothra vs. Godzilla and Destroy All Monsters back in the 60s.
One of those monsters is Mothra and now a small tease to the monster’s arrival in the Monsterverse has been revealed.
So we have had glimpses of the monsters that are going to be joining Godzilla on screen on March 22, 2019.