i've seen the end of quan chi's ending and it says kano's soul was stripped from him and another soul took his body...and quan chi found out it was lui kangs but lui kang's soul is not in kano's body unless you beat the game with quan chi or a different character...i think but i am not possitive about the other character...so just chill out dude...

damn dude calm down.
if you beat the game with Quan Chi you'll see the ending that Kano's body was possessed with Liu's soul.
I doubt that Liu Kang will come back in Kano's body in MK6 but it's just one of the many endings.

The thing about Liu Kang taking over Kano's body is really the fact that, in order for that to happen, Shang Tsung would have to die, and he's one of the favorite baddies in the MK Universe, so there's a very slim chance of it really happening outside the What If ending (i.e. happening between MKDA and MK6).

I actually think there is a much greater possibility of Liu Kang's soul being too much for Shang Tsung to handle and either he will reject it somehow, or Liu Kang's soul will take over his body (which would be cool, IMO, as long as he couldn't scream like he did ).