The following link was posted just shortly ago by another poster, Icon. It clearly states that Bruce Wayne is not dying, and gives a hint for why. Something to do with the big bosses at Warner Brothers.
Check it out: http://www.comicbookresources.com/columns/index.cgi?column=litg&article=2932
So, you can stop worrying. It's all false
."Ladies and gentlemen! You've read about it in the newspapers! Now, shudder as you observe, before your very eyes, that most rare and tragic of nature's mistakes! I give you... the average man!"
(by Joker, from The Killing Joke
Whew! I've been really really worried about that stupid rumor. Wait a minute, isn't that the same web page that STARTED the rumor?! ha ha!