The Sith were actually supposed to be a race of people that the dark Jedi conquered and therefore became there masters becoming Lords of the Sith .
My only point being it would be ridiculously strange that they are meticulous about the music and themes then just copy the Plagueis music for a new character makes no sense .
And the " proof" that snoke just showed up one day, unknown to all and took over the remanents of the empire is from people who are not allowed to reveal details of the movie. so of course they are not gonna admit anything whstelse could they do .
And as usual opinions that's why we're here
Confirmed you keep using that word I don't think it means what you think it means lol
It has also been confirmed in the canonical printed material that Snoke has been around for as long as Yoda, He saw the rise and fall of the Empire. He also was involved in the political scene of the New Republic, influencing Senators. Leia and Han know exactly who he is. So he has a backstory, although still vague. And he's not a Sith, how could he be, Sidious would have destroyed him, and he's not Plageuis.