I thought Majoras Mask was dark in how an ancient demon took advantage of the Skull Kids character flaws in an attempt to destroy the world. Majora was really creepy.
But that's not what this thread is about, so I'll get back on topic. I'd like to see an updated return of the fishing game, as well as plenty of races, like in Majora's Mask. I also hope there are plenty of varied minigames that test your skill with the weapons you collect. For example, you have a certain amount of time to get through a maze, but you have to use the hookshot to get across the platforms that make up the maze. I don't know if that would work, but I think you get the idea. As for the seriousness of the minigames, they shouldn't be downright goofy but they should be light hearted and fun.