Namco Bandai releases more images and character descriptions (after the cut) confirming more fighters in Tekken 6:
Alisa Bosconovich, Eddy Gordo, Lars Alexandersson, Marshall Law and Yoshimitsu
Veering on the side of indescribable, I'll let our image gallery and Namco Bandai's official character breakdowns help you out.
Name: Alisa Bosconovich
Fighting Style: Special
Deep in the forest, there is a heavily guarded research facility. Taking the name of the research leader, the facility is called the Bosconovich Laboratory. The facility was highly valued by the Mishima Zaibatsu, as it undertook all of the military equipment development for the organization.
The lowermost level of the facility houses a top secret section. In one of its rooms, there slept a young girl in a clear capsule. Her name was Alisa Bosconovich. Everything else about her is a mystery...
Name: Eddy Gordo
Fighting style: Capoeira
Eddy failed to win The King of Iron Fist Tournament 5. He pleaded with Jin, who had become the new head of the Mishima Zaibatsu, to help him save his mentor. After looking at Eddy and appearing to think for a moment, Jin agreed to help with developing medical treatment for Eddy's mentor in exchange for Eddy joining the Tekken Force and reporting to him. Eddy knew nothing about the Tekken Force, other than it was a private military outfit, but agreed to join if it would save his mentor.
Eddy became a member of the Tekken Force and carried out plans of destruction around the world. Even though he knew the consequences of his actions, Eddy was unable to leave the Tekken Force. When the Mishima Zaibatsu announced The King of Iron Fist Tournament 6, Eddy joined the tournament as a member of the Tekken Force in order to eliminate those who would threaten Jin.
Name: Lars Alexandersson
Fighting Style: Karate
Force, defected from the organization.
Lars Alexandersson led the coup d'état. With an uncommonly high physical and mental ability, Lars become a ranking officer in the Tekken Force at a young age. Despite his high rank, Lars often fought in the front lines. Due to this and his friendly character, he was popular among his subordinates.
Only he knew the fact that he drew the Mishima bloodline through his father, Heihachi. Even Heihachi was not aware.
Name: Marshall Law
Fighting Style: Martial Arts
In the middle of The King of Iron Fist Tournament 5, Marshall Law's illegal employment in Japan was detected, and he was deported back to the United States. The due date for monetary damages caused by his son's accident was approaching, but Law had no means to deliver the cash and was completely out of ideas.
It was then that Law received an invitation from his friend, Paul Phoenix, to team up in the next tournament. Although certainly difficult alone, the likelihood of receiving the top prize money was higher as a team. After accepting Paul's invitation, Law realized that three people would be even better than two, and he set his eyes on the world-famous boxer, Steve Fox.
Fighting Style: Advanced Manji Ninjutsu
Nationality: None (originally Japan)
Yoshimitsu was following Bryan Fury in order to take revenge for his fallen comrade when he noticed the sinister aura emanating from the spirit sword Yoshimitsu. The spirit sword, by its very nature, was in continuous pursuit of blood and drives its owner insane. Yoshimitsu had been suppressing the sword's power by supplying it with the blood of the malicious and evil. However, it was gradually becoming more difficult to maintain the sword's balance.
Left unchecked, there was a chance the sword may lose control, causing chaos and destruction, and seek out a new owner. In order to prevent this, Yoshimitsu attained the Fumaken, a sword with the ability to contain the power of the evil sword. At the same time, he joined The King of Iron Fist Tournament 6, where evil energy collected, hoping to return the balance of the spirit sword to normal.