The only issue with Zelda, for me, is that it won't have the same freedom of styles that Mario Marker has. Zelda 1, LttP, and the Game Boy ones could all possibly work, but Zelda also has a lot of 3D games. I guess if you limited the styles to Original Zelda, LttP, Minish Cap, and Link's Awakening, that could work. That's four different styles for a dungeon maker, but I think a Metroid Maker is closer to Mario and would probably be easier to make.

@Jeriphro Mario Maker drew mostly from its 2D roots, so I take no issue with a 2D only Zelda Maker. However, they also translated Mario 3D World elements into the 2D space, so I wouldn't mind that they do something similar with overhead Zelda games using more modern 3D elements too. A Link to the Past Remake shows how nice 3D elements can be implemented into the standard overhead Zelda view.

2D Zeldas were the games I grew up on anyways, A Link to the Past being one of my favorite games of all times! They halfway attempted a creator within the Links Awakening remake, but I'd like to see a fully realized creator. Of course though, Super Metroid was also once of my favorite games of all times so I'm dying to see a Metroid maker too. ;)