Monarch’s mission in Godzilla vs. Kong could result in the emergence of more Titans in the MonsterVerse. Godzilla: King of the Monsters established that a long list of Titans are known to exist, but never confirmed that the Titans being monitored by Monarch are the only ones in the MonsterVerse. There could other giant monsters that Monarch has no knowledge of, but that could easily change in Godzilla vs. Kong.
In Godzilla: King of the Monsters, it was revealed that well over a dozen Titans have been in hibernation for centuries. Some of these monsters are from Toho’s library of kaiju, while the rest are original to the MonsterVerse. Apparently, creatures like Scylla and Behemoth have been sleeping underground in various parts of the world. The Titans are so spread out that there’s at least one in every continent, and for every Titan that Monarch knows about, they have a base set up to study and monitor them. The Titans remained dormant until Jonah (Charles Dance) and Emma (Vera Farmiga) stole the Orca and used it to wake up King Ghidorah, who in turn woke up several other Titans.