I think besides a true Rey Nobody version, the force creation with no parents angle is my favorite. The only wrinkle is that it’s not explicitly said that the force chooses a random woman in the galaxy, but I think you can infer that. Below is basically the same with a couple lines changed. I like the idea that maybe Rey’s parents saw the darkness in Rey and sold her because they were afraid of what she was. I would probably freak out too if I were them.
“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.”
“I’d never lie to you. Your parents were no one. Junk traders expecting a child they never wanted.”
“Don’t!”
“Your parents, Rey… they had no part in your conception…”
“I don’t want this!”
“…just like Vader.”
“No!”
“You’ve seen it, haven’t you? Your destiny.”
(Rey sees the vision of herself on the Sith throne)
“Your parents were afraid of your power.”
“Stop talking.”
“The same way Luke was afraid of me.”
(Cutaway to heroes capture)
“The Force showed me glimpses of a girl like you long before we first met. When we fought, in the forest, the power inside of you awakened. You didn’t just reveal yourself to me… you were exposed to the Emperor… 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.”
“Before you chose the Jedi, Palpatine wanted you alive."
“No…”
"I’ll come tell you why.”
“Rey… I know the rest of our story.”
“Tell me.”
"The Emperor manipulated the Force itself into creating life. First my grandfather, and then you. You were his chosen heir. You… are a rightful Palpatine.”
"The Emperor only 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 power in the Force. We’ll end him and the Sith, and create a new order, together…”