Your gateway to endless inspiration
Well if heihachi stays dead (doubtful) then mecha heihachi doesn't have to be evil so it could focus more on Jun stopping the devil gene
No but seriously, it would be the biggest fuck you to Heihachi if Kazuya and Jin make up and fight Mecha Heihachi in Tekken 8 with *revealed alive* Jun and they all walk away ALIVE and free of the Mishima curse after Angel and Jun defeat the Devil Gene from inside them.