Star Wars: The Force Awakens kicked off a new/rebooted franchise the way any movie would: by establishing main characters. One character left purposefully (and literally) in the dark, however, is Supreme Leader Snoke. Going into Star Wars: The Last Jedi, fans still know very little about the big bad, making these five theories about who Snoke is the best leads we have. In The Force Awakens, Snoke is introduced as a shadowy villain who seems to wield power over both General Hux and Kylo Ren. Hux and Kylo might be the faces of the First Order in TFA, but Snoke is clearly the one pulling the strings. His unmatched power led many fans to believe that he must have a larger connection to Star Wars mythology, and he might even be a character we've seen before.
The identity of Supreme Leader Snoke is one of the central mysteries of the new Star Wars trilogy. Everything about his scenes in The Force Awakens suggests an intense secrecy and great importance. The Snoke biography on the official Star Wars site states that he "has no permanent base of operations," and that he does not like to meet with his followers in person (hence the massive hologram he appears as in TFA). The biography also states that "Snoke is powerful with the dark side of the force, and seduced Kylo Ren into abandoning the Jedi path."
Despite his close relationship with Kylo and Hux, it was implied in TFA that there was a chance Kylo had never actually met Snoke in person. That fact coupled with the Wizard of Oz quality to his hologram suggests that Snoke is not as powerful as he might want them to believe. This is made even more obvious by the fact that he avoids putting himself on the front lines in the fight against the Resistance.
The only other thing we know about Supreme Leader Snoke going into The Last Jedi is that he made Kylo change his name from Ben Solo when he joined the Dark Side. It stands to reason, then, that Snoke too is not his real name. So, who is Snoke and what does he want?
Snoke Is Darth Plagueis
Snoke could be Darth Plagueis the Wise (I mean, the GIF above speaks for itself). The character, who was first mentioned in Revenge of the Sith, has never been seen on screen, which makes Darth Plagueis the perfect candidate for Snoke's true identity. According to Den of Geek, Plagueis was a Sith Lord who was so powerful he could "create life." His apprentice, implied to be Palpatine, killed him, but if Plagueis could "create life" it's quite possible he was able to save himself. This would explain Snoke's frail appearance (despite his size, he doesn't look to be in the best shape) and his old age.
Snoke Is Palpatine
Palpatine is one of the main figures behind Darth Vader's rise as the most evil man in the galaxy, so it makes sense that fans think Palpatine might be behind the corruption of Kylo Ren too. Like Pagueis, the Snoke is Palpatine theory relies on the assumption that Palpatine survived his death established in the previous films. There isn't a ton of evidence to back this theory up other than Palpatine's generally evil nature and his creepy appearance, which does bear some resemblance to Snoke.
Snoke Is The Son From Mortis
This theory, found via Syfy, proposes that Snoke's real identity is the Son from Mortis seen in a few episodes of the animated show Star Wars: The Clone Wars. In the show, the Son is representative of the Dark Side. This would make Snoke the human incarnation of the Dark Side — he is the literal embodiment of evil in the galaxy. In an interview with Empire, The Last Jedi director Rian Johnson described Snoke as "a dark force," which would definitely support the theory that Snoke is the Son.
Snoke Is The Last Jedi
A lot of people now assume that the "Last Jedi" in the title of the newest Star Wars film is referring to Luke, but what if it's actually about Snoke? Andy Serkis, who plays Snoke via motion capture, teased fans that Snoke was a tortured character. "He has suffered and he has suffered injury," Serkis told Entertainment Weekly. "His hatred of the Resistance is fueled by what's happened to him personally." Serkis also confirmed that Snoke was "extremely strong with the Force," which could hint at a possible Jedi past. Perhaps Snoke blames the Skywalker family for the demise of the Jedi Order, hence his hatred of the Resistance. Or maybe his woulds run deeper than even we know.
Snoke Is Just Snoke
Of course, there is always the possibility that Supreme Leader Snoke doesn't have a secret identity at all. Maybe he's just a brand new character (and/or species of alien) unique to this trilogy. What made Snoke become the villain introduced in The Force Awakens could have absolutely nothing to do with the Skywalker family drama we've seen depicted in the previous Star Wars films. We'll just have to wait and see.