This photo was released from a magazine, and it's pretty much showing us what we should have expected. Snoke is a part of the race Muun which was Darth Plagueis's race. The text reads origin: unknown, occupation: Supreme Leader of the First Order, weapon: The Dark Side of the Force. There is basically a lot unknown about Snoke, but the possibility of Snoke being Plagueis is much higher. Another thing to look at is on the left is a picture of a man with a beard. Could this be Luke? No doubt this page is filled with a lot of spoilers, but the biggest spoiler is Snoke, and everything is closely relating to Plagueis with Rey's Staff, Andy Serkis's description of Snoke.