To be honest any of the 2D games done in 3D would constitute such a huge switch in gameplay that it would be like an all new game.
I'm not sure about MM being updated, because I thought the original was amazing and in some ways I don't want to touch it. It's like Axle said in one of his...
Simple question. With OoT3DS coming out I heard a few suggestions of MM getting the same treatment and thought "Surely there are more interesting ideas for remake?" Vote for your favourite.