I wouldn't mind it, but I'd question whether or not it would actually work. I've always felt that the Zelda series was targeted towards a family friendly audience. Of course there was an exception with Twilight Princess being teen rated, but that was understandable. What I would expect out of an M-Rated Zelda game is some serious violence, blood-shed, and whatever else seems to fit in that category. I can visualize seeing it, but I can't visualize playing it. I'm not against it, I just believe that they'll have a very difficult time producing, nonetheless creating a Zelda game with an M rating.