Seems like a LOT of people bought it and ended up being disappointed because they thought it was going to be a traditional Zelda game. Well, in this era of the internet where nothing's a secret to anybody, why would you expect that? From day one it was marketed as a Dynasty Warriors game with a Zelda-esque presentation, period. How could you know about the game's existence and ignore that?
By the way, I bought it the other day, and I'm enjoying it a LOT, despite having never played a Warriors game before in my life. If you haven't checked it out yet, I strongly recommend that you do.