I ordered the Hero (with Jet Li) extended version DVD a while ago. It was a chinese release about 7 min longer than the regular version.
However, the picture quality was comparable to a cam version you download form the Internet. It was horrible. On top of that, the company that made the release (FACE) has made their logo visible in the top right corner form time to time.
Hero is my all-time favourite movie and if you've seen it you know that it is the last movie you want to see with crappy picture quality.
So, do not order any 'extended version' or 'limited edition' of Hero on DVD.