Has Godzilla Fought Rodan, Mothra and Ghidorah Before?
In the post-credits scene for Kong: Skull Island, a series of cave paintings teased the introduction of Rodan, Mothra, and Ghidorah into the MonsterVerse. In one painting, Godzilla is shown fighting King Ghidorah. Men with primitive weapons appear in the background, which indicates that these monsters have been around for hundreds--or possibly thousands--of years.
According to the file on King Ghidorah on the Monarch Sciences website, the creature has injuries on his body that look like "claw and scorch marks". Of course, a monster as powerful is King Ghidorah wouldn't be easy to injure, so these wounds had to be the result of a battle with an equally fearsome beast, like Godzilla (the scorch marks specifically point to Rodan).
The trailer for the film shows that King Ghidorah is frozen in suspended animation, which explains why he hasn't been active. The wounds on his body call into question the circumstances behind his current situation. Did Godzilla defeat King Ghidorah long ago and leave him for dead in the ocean? Regardless, what all of this suggests is that these four Titans may have a rich history together, and that Godzilla: King of the Monsters isn't Godzilla's first clash with King Ghidorah.
What Does This Mean For Godzilla 2?
A shared history between the monsters could have a major impact on the story of King of the Monsters. What it means is that the film is basically a Godzilla vs. King Ghidorah rematch of apocalyptic proportions. The trailer and information from the Monarch Sciences website illustrates how much destruction these monsters can inadvertently cause. Rodan can level cities just by flying past them, and King Ghidorah's wings are capable of tearing open the stratosphere. That being said, a brawl between the four monsters could bring the world to its knees. There's no telling what disasters were caused by them in the past, or how the planet's earlier civilizations avoided complete annihilation.
The idea that Godzilla and King Ghidorah have been clashing for centuries is indicative of how powerful the three-headed monster truly is, as opposed to the M.U.T.O.s who had to work together to pose a significant challenge to Godzilla. Unlike the M.U.T.O.s, it appears King Ghidorah was able to fight Godzilla and live to see another day. It's also worth noting the emphasis the official poster puts on the difference in size between Godzilla and King Ghidorah. Is it possible that the movie's title is intentionally misleading, and that King Ghidorah is the true King of the Monsters?
If so, King of the Monsters may do what Godzilla could not, which is give the alpha predator a worthy opponent.