Given that Jin and his alternate form are still alive and well in Tekken 7, the Devil is sure to collect his due again whenever a sequel arrives.
Jinpachi uses an array of unblockable moves in Tekken 5. It's this moral ambiguity and depth that makes Jin such a conflicted hero, and Devil Jin such a fearsome villain and bogeyman for the series. At the end of Tekken 5, Jin Kazama kills Jinpachi and he actually thanks him for his actions. Jin brought down scores of them-but was eventually captured and taken away. By fighting the demon in a battle to the death, he would both rid the world of it, as well as save it from the terror of the Devil Gene. While on his way to fight Kazuya, Jin was ambushed by the Tekken Force. This was a suicide mission, as he hoped to awaken the monstrous Azazel. He would even wage war with the entire world in Tekken 6. Devil Jin's arcade ending even has him absorbing Jinpachi's powers! Jin would still wrestle with his alter ego, wanting nothing to do with its or his evil bloodline. Jin would defeat his grandfather Jinpachi in Tekken 5, becoming the new chairman of the Mishima Zaibatsu. Devil Jin would almost kill Heihachi in Tekken 4, if not for the calming influence of his mother's memory. Jin himself grew to hate Devil Jin, seeing it as the manifestation of his accursed Mishima heritage.