[Sorry]

Originally Posted by Sweet Daddy Hate

After Endor, not before. He's supposed to be bedridden in this movie, too old to get around and on his way out. Wants Rey and Kylo to rule his rebuilt empire together. Talks about a "force diad" that allows two people strong in the force to achieve a greater power together than they could apart. Explains that he and Vader were supposed to comprise one but could not due to Vader's failure at Mustafar and his inability to completely let go of Anakin Skywalker.
Wants Ren to bring Rey to him so that he can turn her. Rey sees a dark vision of herself when she touches an artifact that belongs to Palpatine. ( Trailer ).

Leaves Ren for dead on the ruins of the death star after stabbing him in the chest with his own saber. Ren sees vision of Solo who tells him it's never too late to return to the light. Ren discards his crossguard saber and resumes being Ben Solo.

cool spoiler