“I pushed you in the desert because I needed to see it… I needed you to see it… who you are. The dark side is your birthright. Rey…”
“You’re lying.”
“You were right. Your parents were nobody. Junk traders from the outer rim.”
“Don’t!”
“But they played no part in your conception…” ( I think it’s best to assume that Rey’s parents simply didn’t realize she wasn’t theirs, probably because they’re asshole drunkards.)
“I don’t want this!”
“…Just like Vader.” (I don’t think this line really spoils anything because we still don’t know that Palpatine has any involvement in this.)
“No!”
“You’ve seen it, haven’t you?”
(Rey sees the vision of herself on the Sith throne)
“Luke saw the same fate in me. Only together can we make our own.”
“Stop talking.”
“Rey… I’m the only one who truly knows you.” (I like the Rey/Finn scene referencing this later.)
(Cutaway to heroes capture)
“Long before we met, I had a vision of a girl. When we first fought, in the forest, the power inside of you awakened. You revealed yourself not only to me, but to Palpatine… just as he’d intended.”
(Visions of Rey beating Kylo on Starkiller, falling into the dark cave, etc.)
“No!”
(A pedestal shatters and the mask of Vader falls to the ground)
“So that’s where you are.”
“Our paths have always been intertwined."
“No…”
"I’ll come tell you why.”
—
“Rey, I know the rest of our story.”
“Tell me.”
"Palpatine influenced the Force itself into creating life. First my grandfather, and then you. Like him, you were chosen to be the heir of the sith. You… are a rightful Palpatine.”
"Now, the Emperor wants us to fight each other, so his most worthy heir can claim the throne. But he hasn’t realized the strength of our connection, Rey… a bond, not of blood, but of raw power in the Force. We can end him and the Sith, and create a new order, together…”