I like the idea, but it would obviously need a better story. You're exploring one day. During the traveling, you find Ganondorf there . You fight him and find out what he's doing; He's trying to find a portal to the other realm. He tells you about the evil Triforce he accidentally made(obviously trying to make his own stronger) but then realizes his fragment "Broke out". He didn't have it anymore, and he was trying to get to the dark world to find it. You would then have to travel with him. The temples could still be temples, but they were more like gates. You would have to get the "Treasure"(the item) and defeat the monster inside of it(The boss). The last gate wouldn't have an evil monster, but an old man. He got taken by the monster, trying to deliver a sword to a blacksmith. He gives you the sword and as hid last wish, he asks you to get the sword to the blacksmith. He dies and then you get the Heart container. You go back to the normal world, and go to wherever the blacksmith is. You find him and he fixes the sword, powering it with a different metal(like in PH and the blacksmith). I'm getting tired of typing now, so I'm going to stop and finish the story later.