I hope I’m not too late to give feedback on these options.

This is good.
The hood looks weird the way it appears, then disappears quickly. I still think it would be good to have it be Dark Rey’s face that is revealed when the ice melts away. If you do this, you don’t have to make the hood disappear. This way, you have more of a hint earlier in the trilogy (Which I think is important), without saying yet that she’s a Palpatine. The original scene is frustrating to me, even with sith whispers, because we don’t learn anything about her. (I know it’s because the scene is saying she’s a nobody, but we know now that’s not true.) This would fix that, while still saving the Palpatine reveal for the next film.
This sounds good. Keep it.

4C. This is my favorite. I like how it’s Palpatine using the Force instead of the radio. I like that it keeps the Kylo/Rey exchange, I also love how you save the laugh for when Rey closes the door. I just wish you would reinsert the “It is your destiny” line. It’s a good line, and I believe it makes it the right amount of dialogue. Not too much, not too little.

Llirael Moroth said:

An in this firs cave whispers scene, you could add Palpatines “Rey” from “Oh, I’m AFRAID the deflector shield will be quite operational when your friends arrive” when Reys hand is shown touching the ground, just before she says “It’s calling me”.

I love this idea. Do this.