Personally I believe the reasoning to be that they saw more "real life" Night Elves than any one group should ever see.
While QuakeCon 2006 is apparently still going to happen, it's looking like Blizzard will not be doing a 2006 edition of their BlizzCon, which debuted last fall. According to a post on the subject on the World of Warcraft forums a Blizzard employee stated, "We haven't yet begun planning a BlizzCon for this year, and truthfully it isn't intended as an annual event. We had a lot of fun though, and we're looking forward to getting another one going and inviting everyone to come hang out with us and check out everything that is Blizzard."
Thanks to Firing Squad for that little on dit.
To read the latest guides, news, and features you can visit our World of Warcraft Game Page.