I'm curious about "new hard mode," because the game itself already has most of the features that Hero Mode in past Zelda games: enemies do far more damage than in previous games already, and you can't find hearts to instaheal in the world but need to use healing items.
So I'm wondering if it'll just be the double damage from the Ganondorf amiibo, or if it'll be that coupled with other effects, or if enemy placements and behavior will actually change, or if, given the game's themes, it'll be a full on survival mode with food requirements and even more stringent healing needs.