The series is a retelling of the story of Tekken 3. However, it features more modern elements from more recent Tekken games. Feng Wei, Steve Fox, Leroy Smith, and Craig Marduk are all participants in the tournament, but did not make their debuts until the following games.
At the time of release, Leroy is still a DLC character and doesn't have any involvement in the Tekken games plot. This was his first appearance that ties into the Tekken lore, outside of his game win endings. This is the only character that this is the case for, meaning his role in the story and characterisation were mostly made for this series, whereas all other characters have history within the game story.
Game designer Katsuhiro Harada was involved in the project and stated that he enjoyed the story of Jin's life.