Nintendo announced that they're doing a remake of Legend of Zelda: Majora's Mask for the 3DS. This remake is going to be a graphics upgrade; they're not changing the gameplay in any way, shape or form. Which is a shame, because I'd recommend these changes:
1. Don't be so harsh to new players. When my friend Nathaniel played the game for the first time, he got the bad ending on the third day. When that happens, the game punishes you with a "start over from the very beginning of the game". Nathaniel didn't like having an hour (or so) of progress flushed down the tubes, so he never played it again.
I agree with Nathaniel; that's one place where the game is too harsh to new players. It wouldn't be too difficult to implement a feature that says, "Oh, this is your first time playing the game! Instead of sending you back to the beginning, we'll send you back one day, so most of your progress is saved." (To prevent cheating, this auto-save system would only work on the first in-game cycle.)
2. The Anju/Kafei subplot has unnecessarily difficult triggers. It is impossible to fully complete the subplot the first time around, or the second time around. It requires three full cycles to complete. This is an oddity, since every other subplot can be done in one go. I'd recommend tweaking it, so you can completely do the subplot in one cycle.
3. The American and Japanese versions have different save systems! Specifically, America got an auto-save system, with the owls and such. It'd be nice if they kept that in the remake. But if the Wind Waker remake is any indication, they're using the Japanese version for a frame of reference.