On June 21, 2017, social media pages for Kong: Skull Island began posting weekly videos detailing Monarch's timeline of events from 1915 to 2016. Note that certain timeline events have been named but not all the full descriptions of a few events have been revealed yet.
WARNING: SPOILERS AHEAD!
Skull Island: The Birth of KongMonarch security officer Aaron Brooks defies his father, Houston Brooks, and leads an off-the-books mission to Skull Island, to not only determine what has become of Kong since the 1973 expedition, but also for assurance that Kong is on their side.
- The Mothra species awakens, and is partially tamed by Dr. Emma Russel's "Orca" device. However, after being kidnapped by Eco-terrorists, Dr. Russell aids them in releasing Monster Zero, which actually manages to fight off Godzilla on release.
- Mothra meanwhile roosts itself in a waterfall, cocooning itself to reach its final form.
- Following Zero's release, it flies to a small town in mexico, where it battles a second newly released monster: Rodan. The Rodan fights with Zero for a while, until finally made to heel. Zero then fights Godzilla a second time, but both are caught in an explosion from an experimental Oxygen destroyer. Zero escapes unscathed, while Godzilla retreats underground to recover with radiation.
- Letting out a mighty roar, Monster Zero, now rechristened Ghidorah the false king, awakens all 13 remaining titans, causing them to begin destroying the world to reshape it to its liking.
- Mothra finishes hatching, but her biological programming to be with Godzilla has her resist Ghidorah's call, leading her to fly to Monarch HQ, sending out a call that reaches the wounded Godzilla.
- Following the fully evolved Mothra to above Godzilla's resting place, Monarch uses a nuclear bomb to give Godzilla more power quickly, allowing him to rise and face King Ghidorah one final time.
- Mothra briefly lays an egg in case of her death.
- Meeting in the evacuated city of Boston, Godzilla and Mothra face off against Ghidorah and Rodan. In the course of the battle, Mothra is vaporized after fighting off Rodan, and Godzilla takes her energy to become red fire Godzilla, destroying Ghidorah almost entirely except for a single dead head.
- As the other titans gather around him, Godzilla cows them all (including a surviving Rodan), officially reclaiming his place as King of the Monsters.
- As the world begins to better comprehend their new reality, an uneasy peace is reached with the monsters, with Godzilla shoving any rowdier ones away from human settlements as part of their "Truce" with humanity.
- Eco-terrorists buy the last dead head of Ghidorah.