10 Fascinating Theories About Star Wars: The Last Jedi
6. Supreme Leader Snoke Is Darth Plagueis
Darth Plagueis is a pretty huge deal in the chronology of Star Wars considering he has zero screen time and exists only as an anecdote told by Chancellor Palpatine/Darth Sidious in Revenge of the Sith.
There’s a very real chance that Plagueis was Sidious’ master and brought the whole Sith Master/Apprentice thing into being, or at least ushered in its current, Republic-devouring era.
Supreme Leader Snoke is a magnet for fan theories, possibly being deliberately made as such by the filmmakers. Darth Plageuis is a pretty good fit for the holographic corpse baby. Plagueis probably exists in Force Ghost form so it makes sense he isn't encountered in the flesh.
If anything, the biggest argument against Plagueis being Snoke is he fits too well and so he won't be that big a twist, especially given Plagueis is comparatively obscure to most mainstream Star Wars fans having never actually been shown on-screen.