Well I can tell you who he's not...
the first episode they heard the smoke monster near by in the jungle.. at this time "Mr.X / the man in dark" was trapped inside the cabin by the circle of ash. When locke later visited the cabin, he heard a voice say "help me!" (*(so, locke broke the ash..)) and let the man in dark out. so, the logical thing is that the smoke monster scans people and copies their memories, then it reports back to the man in dark and he can change his appearance into someone in those memories, because he is a half god/god/has godpowers(probably)
>He change into Wet Walt, so shannon died?(I recall hearing whispers, maybe the man in dark is making the whispers..)
etc...
(*(I have a picture of it in my head.. need to find the episode))
I made this because there is a lot of people that thinks the man in dark is the smoke monster.
the first episode they heard the smoke monster near by in the jungle.. at this time "Mr.X / the man in dark" was trapped inside the cabin by the circle of ash. When locke later visited the cabin, he heard a voice say "help me!" (*(so, locke broke the ash..)) and let the man in dark out. so, the logical thing is that the smoke monster scans people and copies their memories, then it reports back to the man in dark and he can change his appearance into someone in those memories, because he is a half god/god/has godpowers(probably)
>He change into Wet Walt, so shannon died?(I recall hearing whispers, maybe the man in dark is making the whispers..)
etc...
(*(I have a picture of it in my head.. need to find the episode))
I made this because there is a lot of people that thinks the man in dark is the smoke monster.