Seeing as no make a topic about it, why not make a topic about Season 5. Well and theories for Season 6 as well.
As we know, one side is light, one side is dark. Duh.
But in the finale for season 5, it seems that Jacob and Black Shirt Man(Obviously the smoke monster) are at odds against another, and we find out it's just a game of theirs to play.
THEY COME, THEY FIGHT, THEY LEAVE.
Jacob goes outside to the world to find suitable individuals, to touch them in a place they are never been touched before. Jacob you sicko. :p But to actually tell them advice to get to where they are today. But things didn't change.

Jack and Locke are odds at another.
Oceanic 6 leaves, they come back to find destiny. Only to land in the 70s, to fuck things over with DHRAMA. Sayid shoots young Ben, as it's already happened already. LOL LOOP.
Locke is alive, but finds out he's taking over the others and leading to kill Jacob. But it seems it looks Locke isn't Locke at all. He could the one and only smokey who changes into dead people. That's all I got out of it.
LOST ENDS WITH JULES, THAT HOT SMOKING BLONDIE, blowing up the bomb(or not) and screen turns to white, and lost title turns to black. Changing the alignment of the good and evil.

Tune in next year for Season 6, as they reveal all the mysteries, and closing the chapter of Lost.
Season 6 Mini Promo
http://the-odi.blogspot.com/2009/05/lost-season-6-first-official-promo.html