Från http://www.dragonmount.com/Interviews/2002-12-09_rj.aspx
Question: BEFORE you say "RAFO", and BEFORE you choose not to answer this next question, please consider the following and hear us out: You claim you've already written the ending of the series. You probably enjoy us squirming as we endlessly try to predict the outcome of the Last Battle. We've been patiently waiting for over a decade. Now that we're nearing the end somewhat, could you please, please answer this question: What is the last word of the last chapter of the last book? JK Rowling told the world that Harry Potter ends with the word "scar". Come on....we know you can give us something like that to chew on.
RJ: First off, a small correction. I have NEVER said that I had already written the last scene of the last book. I HAVE said that I COULD HAVE written the last scene of the last book in 1984, and that if I had done so and now chose to write it again, some of the wording might have changed, but what happens in that scene would be the same, now as then.