From Empire Magazine:
“It was quite an unusual situation,” Serkis tells us in the new issue of Empire. “I worked specifically with Domhnall Gleeson and with Adam Driver. My first day was basically standing on a 25-foot podium doing Lord Snoke without the faintest idea what he looked like… or in fact who he was! I was very high up, totally on my own, away from everybody else, but acting with them.”
This is purely based on some kind of subconscious free association process in my own addled brain rather than facts or evidence, but when I read that I immediately thought he must be some kind of serpentine creature reared up vertically like a cobra. The first place my mind went was to this:
and after that, to this:
I’m probably just conflating this new info with the early concept art where he had a snake head, but who knows.
Also, here’s the actual soundtrack art:
