I mentioned somewhere or other after I first saw TFA, that I loved the way Snoke looked like an Evil version of the Lincoln Memorial…
…but I just compared those nice shots from the OP with some Lincoln face-casts and there is a possible influence there IMO…
What that says about his origins, I’m not sure. He’s probably plagueis (Hopefully not) but maybe he’ll be introduced as a younger character in something like Rebels? Darth Ezra! 😉