KAZUYA体内的恶魔基因不是遗传的，而是小时候掉落悬崖后从伤口进去的
至于4代究竟是本体还是克隆体这个不好说，不过从身体上的伤痕来看应该是本体

其实3代的剧情设定是斗神把所有在3代没有出场的2代的角色都杀死了，BAEK、BRUCE、JUN等等，斗神杀掉他们后掌握了他们的武学精华（斗神的招数就是这些人招牌技的集合）。不过后来为了商业利益只好对之前的剧情设定选择性无视，把老人又都派上场（包括掉进火山本应化为灰烬的KAZUYA）
3代街机的演示动画，有一个镜头是斗神手里拎着一个人头，那个其实就是JUN的头。JIN在母亲被杀之后投奔了爷爷

下面是多玩网站的《铁拳3》剧情简介，时间不准确，应该是铁拳2大赛19年后
http://tv.duowan.com/0910/119979957833_3.html

剧情里JUN确实是死了，而且是被OGRE杀死的

某些人缺乏想象力而且没有主见别人说啥就是啥

During The King of Iron Fist Tournament 2, Jun Kazama wound up impregnated by Kazuya Mishima. At the conclusion of The King of Iron Fist Tournament 2, Devil left Kazuya and attempted to possess Jun's unborn child. But Jun defeated Devil and later gave birth to a son, Jin. She raised Jin for 15 years and taught him her Kazama style traditional martial arts. The two formed a strong bond and were very close. Sometime after Jin's 15th birthday, Jun sensed that approaching of Ogre and warned Jin to seek out his grandfather, Heihachi Mishima, should anything happen to her. One night, Ogre did indeed attack. Jun screamed for Jin to flee but Jin wished to protect his beloved mother and prepared to fight Ogre to save Jun. However, Ogre was too much of a match for Jin and defeated him easily. What happened next is unclear, but by the time Jin woke up, the Kazama house had burned to the ground and Jun was missing. Jin searched for her frantically but was unable to find her. He was devastated and swore revenge on Ogre.

She was also featured as a short cameo for the arcade opening for Tekken 3, alongside Kazuya Mishima (who also made a short cameo) and Jin Kazama. Also, Ogre is holding something like the top of a pillar, or more likely a head, which is presumed by some to be Jun's, though it can't be confirmed.

来源 http://www.tekkenpedia.com/wiki/Jun_Kazama

上面的网站料挺多的，感兴趣的朋友可以去看看

引用:

原帖由 df3d 于 2009-11-11 15:30 发表
刚才回顾了下视频：斗神取首级的背景是竞技场，而不是袭击jun母子燃烧的废墟。回去找一下资料再来聊。

http://hloli.appspot.com/gfwtube/M0JM1QdafWg/

你怎么看出来是竞技场的
我看更像是废墟，而且空气中飘散着燃烧后的浓烟

反正制作人一张嘴，怎么说怎么是

你们研究吧，我不掺和了