Remember the post about the introduction video and the easter egg. Well if you don't they released a new update with the answer.
On to the second update where you can vote on which class is your favorite.The easter egg is a little NWC logo hidden among the illustrations of the book the narrator is reading. This is what it looks like in the book.
More information.Now that you’ve had the opportunity to get acquainted with the the first four classes as well as the four new classes revealed with the latest patch, we’d like to know how you feel about all of them. Therefore we’re asking you which class you like best, which one you pick first all the time, and why.