Long ago, in the great depths of the universe, there lay a great monster, a force of darkness. This dark creature was known as Tenebris, the God of Darkness. He ravaged through worlds, and eventually landed upon Vestroia, the home of the Bakugan. He brought together his own personal army of Gargonoids to help him conquer the Bakugan world, but he was stopped by six brave warriors, who would later on be known as the Six Legendary Soldiers of Vestroia. These warriors sealed him inside the Silent Core, and kept him in check with the positive power of the Infinity Core, to ensure that he would never appear again. However, even these warriors could not foretell the danger that was about to happen.
A few millennia later, Naga, an attribute-less Bakugan wanted to obtain ultimate power, through the means of the Silent Core and Infinity Core. "At long last, I have entered the center of Vestroia. And I have found the two conflicting forces: the Infinity and Silent Core. Together, they shall be mine!" However, Naga absorbed too much of the Silent Core, causing an awakening of the dark creature within. And then, the Infinity Core, the only thing that was binding him, was sent to Earth, thereby feuling his rebirth.
"At long last, I have been released. And now, I will wager destruction upon the universe once again."
With that, Tenebris unleashed his wrath upon Vestroia, causing many Bakugan to go insane, and created emissaries for Naga, namely Masquerade and Hal-G. He also triggered a cataclysm in Bakugan Valley, Australia. Julie witnessed it, and was shocked. "Whoa, what's going on over there?"
And so, a darkness is reborn. A darkness like no other, and it is set to take the universe by storm once again.