abbadon means guardian of the abyss, and refers to a dark angel in revelations

he seemed to get locke to the island

but wasnt aware that there were survivors, cuz he asked hurley

also the enhanced s4 ep2 says the chalkboard is a clue to what he wants

http://forum.lostpedia.com/showpost.php?p=479933&postcount=3

Never come between a black man and his hustle in a room full of white people