Fine point about any “chosen one” wording or whatnot in considering a Rey Nobody version. I mean, however to imply to both versions would be good. However, there should be SOMETHING special about the dagger working for Rey, or even Kylo, in regards to taking the Sith throne specifically, in which a person like Orchi isn’t able to become. (But regardless, make it work)

I would be hesitant to use any footage from ROTJ since it would visually stick out due to the resolution and whatnot from the original film. Just personal view it may stick out a bit too much.