Welp, I was wrong. That is indeed Mark Hamill speaking in the trailer. But it's not a recording of his dialogue in RotJ. It's a current Mark H. reciting his lines from thirty years ago. That explains why it sounds off to me.
Who and what he's talking about, however,
remains to be seen.
But I'm still puzzled. Of all the classic lines from the original movies, why are
these in this trailer? The use of 'has' in 'My father has it' has only spurred speculation that Darth Vader will make an appearance in this movie. Unless there is another brother/sister pair that needs to be informed that they are strong in the Force, there's no point in rehashing this scene. And if there is (as was my first thought) then why is Hamill reciting the line and not the young hero?
And, as Tom and countless meme-creators on the internet have so obligingly reminded us, this dialogues revolves around the squickiest concept in the six movies--that Luke once had a hard-on for his sister. Is that the evoked imagery that JJ was going for?
