The post-credits scene of Godzilla: King of the Monsters sets up Mecha-King Ghidorah as a villain in Godzilla 3. Godzilla has succeeded in defeating his ancient enemy, but thanks to advanced technology, Ghidorah can get another shot at Godzilla. Godzilla 3 can renew the rivalry between the two alpha predators -- but with a twist.

Godzilla: King of the Monsters brings three classic Toho kaiju to the MonsterVerse for an epic showdown that threatens the entire planet. When eco-terrorists scheme to save the world by using a device called the Orca, Titans are unleashed upon the world. The return of King Ghidorah, an alien monster defeated by Godzilla centuries ago, draws Rodan and Mothra into a battle for dominance with Godzilla. After a near-death experience and three brutal encounters with King Ghidorah, Godzilla makes one last stand against King Ghidorah and manages to destroy him with his atomic pulses. With King Ghidorah dead, Rodan and the other Titans recognize Godzilla as the new alpha.

Related: King Of The Monsters Proves Godzilla Vs Kong Is A Rematch (Sort Of)

King Ghidorah is Godzilla's biggest enemy in the Toho movies, so it seems only fitting that he would be the main antagonist. Ghidorah has been a thorn in Godzilla's side for 50 years, having fought him seven times now beginning with Ghidorah, the Three-Headed Monster in 1964. King of the Monsters may not be their last fight in the MonsterVerse. Here's how Godzilla's ultimate enemy can be back for another round at some point in the MonsterVerse's future.

Who Is Mecha-King Ghidorah?

In 60 years of Godzilla history, Mecha-King Ghidorah has only appeared in one movie. In 1991, Toho released Godzilla vs. King Ghidorah. The film provided a unique spin on the traditional Godzilla formula. In the 1960s and the 1970s, Toho developed Godzilla into a heroic figure who served as the protector of Tokyo. Godzilla vs. King Ghidorah does away with his heroic image by using time travel to alter a significant event in Godzilla's life. The result is the creation of a meaner, more aggressive Godzilla.

After Godzilla kills King Ghidorah and rips off one of his heads, the government decides to use the monster's body to build a weapon against Godzilla. After giving him a robotic head and metal wings, they're able to restore King Ghidorah to life, but under their control. For the first time, Ghidorah becomes a protagonist. The more powerful Mecha-King Ghidorah poses a significant challenge to Godzilla. At the end of the movie, both are submerged into the sea, and only Godzilla is shown to have survived.

Ghidorah Is Dead, But Maybe Not Permanently

Godzilla definitely killed Ghidorah in King of the Monsters. All three of his heads were obliterated by Godzilla's atomic pulses, but the post-credits scene leaves the door open for a potential return. In the scene, Jonah (Charles Dance) meets a black market dealer who takes him to a head of King Ghidorah, which Jonah proceeds to purchase. This head hasn't been destroyed because it was torn off prior to their final battle. In their second fight, which took place in the ocean, Godzilla bit off one of Ghidorah's heads. After Godzilla was taken down by the Oxygen Destroyer, Ghidorah flew away and used the energy from the volcano to grow back his missing head. This head is the last thing that's left of Monster Zero, and it could be the key to bringing him back to life.

Related: Godzilla: King of the Monsters Suggests Kong COULDN’T Beat Ghidorah

As with the Toho version of King Ghidorah, the MonsterVerse's take on the three-headed monster may be able to come back from death, but with a little help from humanity. If Jonah brings back Ghidorah, he could serve as a villain in Godzilla 3, or maybe even as an opponent that Godzilla and King Kong will have to team up against in next year's Godzilla vs. Kong.

The Monster-Verse Has Advanced Enough Technology (And Resources)

Jonah has the head of Ghidorah, but how can he turn it into a weapon? The answer may already exist in the MonsterVerse. The bunkers and ships in King of the Monsters are proof of the technological advancements that Monarch has been able to reach. If Jonah has the resources to take away the Orca, he may be able to gain access to other technologies as well.

The credits of King of the Monsters teases more advancements that Jonah can use to further his goals. Titan excrement being an energy source is a scientific discovery that Jonah could exploit. An extremely potent energy source would of course be required to power something as large as a Titan.

As for how he'll build a new body for Ghidorah, Monarch is ahead of the game here too. One of the articles in the credits, "Monarch Boosts Forces Around Skull Island", reveals that Monarch was developing a "mechanized giant". The existence of a robotic Titan in the MonsterVerse could be a reference to Mechagodzilla, or it could be something much bigger. If Jonah were to get his hands on this technology, he'd be one step closer to building Mecha-King Ghidorah. The next step may be hinted at in the same article. It's stated that in addition to the "mechanized giant", Monarch was also developing organic Titans. If Jonah implements this process, they can recreate the tissue and organs needed to make parts of Ghidorah's body.

Related: Looks Like Godzilla Made Skull Island The MonsterVerse's Monster Island

Why Mecha-King Ghidorah Isn't A King of the Monsters Retread

If Godzilla 3 or Godzilla vs. Kong does indeed introduce Mecha-King Ghidorah, it won't mean that the movie will repeat the plot of King of the Monsters. In King of the Monsters, Ghidorah was a destructive force who used his abilities to terraform the planet. Emma (Vera Farmiga) and Jonah wrongly believed that he could be used as a tool. But as Mecha-King Ghidorah, he can be exactly that. Potentially more powerful than the original version, Mecha-King Ghidorah could be under the direct control of Jonah (by way of a device similar to the Orca), making the humans -- and not the monsters -- the real villains of the movie.

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