I have a test posted on the other thread, and I’m pretty sure that just redubbing “Because you’re a Palpatine.” to “Because you’re a Palpatine?” allows you to pretty much dispel whatever you want with the next line he says off screen. Remember, he’s expressing in the moment what Rey wants to say herself, but is too scared to. But when he phrases it like a question instead of a statement, it no longer has to be fact.

The only way your other idea would work is if the Rey intro scene were modified, but then you’d be dealing with lips on screen. Seems like quite a bit of work for a reference.