SC2: The Enigmatic Samir Duran--What is He?

Samir Duran, one of the more mysterious Starcraft figures going into Starcraft 2, has sparked a detailed discussion on the SC2 forums: just who, or what, exactly is he?

The Short Version: Tasty lore compacted into a readable thread, with handy anecdotes and a dash of campaign nostalgia

Epic-Quality Post:

The fact that Duran says he is the "servant of a far greater power" that is "reflected in that creature" has a few possible ideas .

He is a servant of the xel'naga, and that creature is the culmination of their dreams (reflecting their power)

He is a xel'naga, but a servant xel'naga, and that creature is the culmination of their dreams (reflecting their power)

He is a xel'naga, but the xel'naga are servants of a greater power, and that creature is the culmination of their dreams (reflecting their power.. or perhaps a super overmind that wishes to control the hybrids)

He is a servant of some other race that rivals the xel'naga, that desires to creature is the culmination of their dreams (reflecting their power)...
-Krikkitone, Lordaeron (excerpt--see complete post)