Keeping the surprise until TLJ is the way to go. You can’t giveaway the biggest twist of the sequel trilogy in the first sentence of a crawl for a movie Luke is barely in.
I guess you’re not getting what I’m saying. I’m not talking about what needs to be there, I’m talking about what doesn’t need to be there. It is saying that he is doing one thing, but also that he has vanished, in the same sentence. Both things cannot be true at the same time. It needs to say that he WAS doing a thing, but now he isn’t because he has vanished. The wording just doesn’t make any sense.