Some interesting fan theories and speculations about Snoke. Hardly ground-breaking stuff, but a fun read nonetheless.

http://whatculture.com/film/star-wars-the-force-awakens-6-theories-about-andy-serkis-supreme-leader-snoke.php

One of the more plausible theories suggest that Snoke could simply be the supreme leader of a First Order planet/region, much like how Tarkin was a governor, or rather "Gradn Moff" of a star system.
One of the more 'wild' theories is that he could be a member of the Whills. Very unlikely, but it would be funny if Kasdan/Abrams had actually dug up that old of an idea. I'm guessing that they based that idea of his lines from the trailer about feeling a change in the force.