Tekken 6 Storyline (Tekken Series)

The King of Iron Fist Tournament 6
Shrouded in mystery, the King of Iron Fist Tournament 5 came to an end with the defeat of Jinpachi Mishima at the hands of Jin Kazama.

Jin took control of the Mishima Zaibatsu and began using the special Tekken Force unit to carry out covert disinformation and paramilitary operations. As a result of its efforts, the general public became paranoid and minor incidents around the globe soon evolved into major conflicts. Governments around the world grew increasingly impotent as chaos spread. At the peak of the carnage and confusion, the Mishima Zaibatsu arose from the darkness, flexing the full potential of its military might and declaring its dominion over all governmental rule.

The Mishima Zaibatsu took control of the world with overwhelming force. In response, G Corporation materialized in opposition to the Zaibatsu, setting-out to subdue the Mishima forces globally. Hailed as civilization’s savior, The G Corporation offered a generous bounty to anyone who captures Mishima Zaibatsu's leader, Jin Kazama. In an effort to lead the next steps in the deadly dance between organizations, The Mishima Zaibatsu set the stage for battle with its announcement of The King of Iron Fist Tournament 6.

Some seek fame. Some seek the bounty on Jin's head. Some seek solely to banish their own inner demons. Each fighter has a unique agenda. Welcome to The King of Iron Fist Tournament 6.
Armor King is Armor King (II)'s brother
As indicated in Armor King (II)'s second ending, the two Armor Kings are brothers.

Asuka Kazama is bitter rivals with Lili

Dr. Boskonovich is Alisa Boskonovitch's father
Dr. B created Alisa in the image of his late daughter.