One of the best things about the Internet is that anyone can put out a theory about anything, just like these Darth Vader fan theories. While most of the time this results in some sort of crackpot diatribe nobody can understand other than the person who posts something on sites like Reddit, there are occasions where a theory about something in popular culture actually makes a good amount of sense.
Theories like the narrator at the beginning of Aladdin being the Genie in disguise were floated around the Internet for years before Disney finally confirmed it to be true. The theories out there that haven't been confirmed are many, but that doesn't mean they don't have some element of probability in them.
Theories about Darth Vader have been around long before the Internet was invented, and people are still trying to come up with ways to explain the complexities of the Dark Lord of the Sith.
Of all the fan theories about Darth Vader found online, these 15 are the ones that may, in fact, contain a nugget of truth, so find the one you consider to be the most plausible and give it a vote up to see which one rises to the top!
Source: Redditor u/stormtrooper1701
Details: Typically, when you see Darth Vader on screen, he's a cool and collected person. He rarely raises his voice, and he lets his visage and indomitable will induce fear into the people around him. That wasn't the case when he first showed up onboard the Tantavie IV, and there may be a reason for it.
After Rogue One came out, the reason for his anger became perfectly clear. He had just chased the Death Star plans to that very vessel, so he knew with 100% certainty that it wasn't simply a "consular ship on a diplomatic mission." He was p*ssed that they tried to lie about something that had happened, not 10 minutes before we first see him on the ship.
It makes perfect sense that he wouldn't be willing to put up with any of the crap they tried to sell him. That includes both the captain and Princess Leia, who was absolutely a traitor and a spy... from Darth Vader's point of view.
Source: Redditor u/mybustersword
Details: In The Empire Strikes Back, right before Han is going to be frozen in Carbonite, Chewbacca goes comepletely ape, and throws off three Stormtroopers, so he could aim his weapon at Darth Vader. Just before he can make the shot, Vader lowers a nearby Trooper's arm to keep him from shooting Chewie -- at least, that's what it looks like.
This theory says that he wasn't stopping the Stormtrooper from shooting Chewie so much as he was making sure C-3PO wouldn't be hit accidentally. At the time, Chewie was carrying a dismantled, but still active C-3PO on his back, and the memory of building the robot during his childhood caused Vader to protect him.
It's an interesting theory, and certainly a plausible one, as Vader showed no interest in saving the lives of anyone who opposed him. He froze Han to test the Carbonite freezing process, and he had no connection to the Wookie. There really wasn't any reason to stay the Stormtrooper's hand other than to save 3PO from certain destruction.
Source: Redditor u/Omni314
Details: The theory that the Sith purposefully created Anakin Skywalker, and thus, Darth Vader has been around for some time, and many consider it to be true. In Revenge of the Sith, Palpatine is discussing the legend of Darth Plagueis with Anakin, where he says, "...he could use the Force to influence the midichlorians to create life."
When you consider the words of Anakin's mother from The Phantom Menace, where she said, "There was no father. I carried him. I gave birth. I raised him. I can't explain what happened," it seems obvious that Anakin was the creation of the Sith.
Details: There has been a lot of talk over the years as to how Vader was able to sense Luke, but he wasn't able to do the same when it came to Leia, whom he tortured early in the first film. Granted, he wasn't calm or collected when it came to battling his son, and he even chopped his hand off, but what about Leia.
It seems unlikely that Vader wouldn't know Leia was his daughter, but if he didn't know it in the beginning, he did know it in Return of the Jedi. Vader has been angry with Palpatine for 17 years at this point, and when he finally did learn of Leia's connection to him in the Throne Room, he let his anger and pain come to the surface, which finally enabled him to confront his master and kill him in the process.
Essentially, he was filled with rage at the fact that Palpatine had lied to him about the survival of his child (which turned out to be two children), and the guilt he felt over realizing he had tortured his own daughter. It was too much for Anakin to hold in, and he rage-quit his job by flinging his boss off a platform.