This one might be an outrageous theory that could make fans lose their minds but what if Rey and Kylo Ren were destined to switch sides after all? Yes, Kylo might be the heir apparent to the Dark throne but that doesn't mean that he never questioned why he was there in the first place. For one, Han Solo almost pulled him out of the Dark Side and Rey? Who would ever forget Rey almost killing Kylo with a blow by her lightsaber? Well, it could be very unlikely that they would totally turn their backs on their causes but this could make this very very exciting. 

This theory has shown glimpses of proof in the last Star Ward movie. This just means that that force that both Kylo and Ren possess are equal, therefore, having a clear winner in a head-to-head battle would be hard to fathom. As a scene in 'The Last Jedi' shows us that both of them pull at the lightsaber and it eventually breaks through the Force, it is inevitable that when Darkness comes out, Light will always be there to meet it. 

There is no question that there Kylo Ren has climbed up to ranks to be on top of the Dark Side. Based on what we've seen from 'The Last Jedi', there can be only one that can end Kylo's power and this is no other than Rey. It is clear that Rey means to the Light what Kylo means to the Dark and this means that sooner or later, one of them will have to revolt against the other. If this theory is somehow correct, the ending of Episode IX could be one to be remembered for a long time. 

While everyone is expecting a long-lasting Reylo romance just like it should be, what if Episode IX shows quite the twist and shows the death of Kylo Ren? While this is not the ending most of us would want, this would somehow make sense as Kylo already possibly loves Rey and dying for her in some way could redeem everything he has done. A Kylo Ren death in 'Rise of the Skywalker' has been long heard of but dying for Rey brings this to a whole another level. 

In a perfect world, or galaxy. for that matter, this theory would make the most sense. If Rey somehow happens to kill Kylo and releases the good spirit of Ben Solo from within, then everybody would feel grief and satisfaction at the same time. With this transpiring, Rey could easily avenge her cause while bringing out the good all at once. Something like this happening would give the Reylo love story a lot more weight and significance, which is what we like, don't we?