Board Thread:Mortal Kombat X/@comment-49.193.83.176-20140901102236/@comment-7426210-20150316004522

Now theories of how Kuai Liang becomes human, it could be that Quan Chi is responsible for it. My thoughts is that his soul was removed from his cyborg body. After all, in some games, when a cybernetic person dies, his soul's appearance is free from any cybernetics or being a cyborg.

and for those who still argue it still could be Bi Han, tough to say unless it is Kuai Liang's body with Bi Han's soul. The comics has made it clear as do the 7 mins Story mode trailer. The Lin Kuei Cyborgs announced his name. Johnny Cage in the Story mode trailer also told the beaten Kuai Liang that he like him better when they were working together.