How will Captain Marvel be linked to the Quantum Realm?
Quantum Realm is the brainchild of Dr.
In 2017, Dr. Spiros Michalakis made new statements about the Quantum Realm. He hinted that this world plays an important part in Captain Marvel: `There are many ways for this idea (Quantum Realm) to appear on the screen.
Before the first trailer was released, people still couldn’t come up with a theory about the origin of this female superhero’s power.
Could Captain Marvel’s power come from the Quantum Realm?

The trailer revealed some details about Carol Danvers’ past: she used to work in the air force and gained her powers after an explosion on another planet.
Ant-Man & The Wasp once revealed the ability to absorb energy if someone comes into contact with the Quantum Realm, as evidenced by the fact that both Janet van Dyne and Ghost were somewhat transformed by quantum energy.
According to president Kevin Feige, Captain Marvel is the strongest superhero ever introduced by the MCU.
The Kree are doing experiments on Quantum Technology and Captain Marvel is the `guinea pig`?

Comic book fans already know the close relationship between Captain Marvel and the Kree race – This alien species has had experiments related to quantum energy.
This detail will change in the movie when Carol is turned into an experimental subject by the Kree in the hope of turning her into a fighting weapon with the power of the quantum world.
Accordingly, the Kree continued their experiments after witnessing Captain Marvel’s power and created Nega-Bands bracelets to help other characters control their powers.
Connection to Avengers 4?

With endless power from the Quantum Realm, Captain Marvel is naturally the strongest superhero ever and can overcome an infinity stone.
Besides, she can become the key for other superheroes to open the Quantum Realm and help Ant-Man escape.
After all, this is just a hypothesis, but it has become more grounded and more reliable after what we witnessed in the Captain Marvel trailer.