I've never played Majora's Mask, but I've seen a lot of videos about it and I heard that it's a dark and great game, so I wouldn't change anything in the gameplay. I just want better and breathtaking graphics, since it's been 12 years of the Nintendo 64 release. Maybe an option in which you can change between the new and original graphics would be cool.
I really hope they release this remake, because I want to play it in a handheld console like the 3DS, with better graphics and stuff.