Jo will have the final word

JKR has changed the final word. She says the word "scar" still appears very near the end, but it will no longer be the very last word, so what will it be? NO CLUE. I mean, I can hazard a few guesses: "horcrux", "life", "Snape".... It's no use, though.

I think, as many readers have also thought, that the final sentence(s) will either be:

1. a small revelation about the scar itself, like: Snape or Hermione explaining the scar was actually the entry point for a horcrux... or a horcrux itself; Hermione explaining that she should have realized it before, that Harry's scar isn't just shaped like a lightning bolt...it's also shaped like a rune -- the sowulo....
2. or a statement like "and to think it all started with a scar on his forehead", though hopefully nothing quite so flippant as what I just typed....

Harry's scar remains

Looks like even during the final battle with Voldemort, Harry is still sporting the rune-shaped scar. It's depicted quite subtly by Marie GrandPré, but it's there. As Dumbledore said, Harry'll have that scar for the rest of his life.