Star Wars: The Rise of Skywalker showed Rey and Kylo Ren were a prophesied Force dyad, hence why they had a strong bond. But what is a Force dyad?

Major spoilers ahead for Star Wars: The Rise of Skywalker. By now, you probably know that Emperor Palpatine somehow survived his apparent death at the hands of Darth Vader at the end of Return of the Jedi; that much was given up in the official trailers for The Rise of Skywalker. But just how and why the nefarious Darth Sidious returned is something you'll have to see the movie to find out ... or you can continue reading this spoilery explanation of just what the saga's ultimate villain planned all along. Throughout the history of Star Wars, a battle …