Nibiru is a hypothetical pseudoscientific planet postulated by Zecharia Sitchin, it is based on Babylonian mythology and astronomy.

According to these theories, the Anunnakis swere actually aliens.

In the comics, the name Nibiru has been used on more than one occasion.

Fables

Nibiru is a world destroyed by magic.

DC Comics

Nibiru is a planet to which the city of Kandor was transported, becoming New Krypton.

Marvel Comics

In the Marvel Universe, Nibiru describes two distinct places:

• A planet in the Solar System.
• A artificial planet created by the Annunaki race, he is called Marduk, like the Babylonian god.