I understand. It would take several years to make. Right now, all I can do is just write fanfiction & novels and by the time I can get my computer fixed up and updated, just make random mods and fiddle around with stuff in order to get the hang of the roms (Referring to both OOT, MQDR and MM) before making something big.
Maybe if possible, I could learn to make a mod that whom and as I always say; would consider it to be the equivalent of Super Mario 64 Last Impact in Zelda OOT and/or MM.(If either one is compatible) with customization like enemies, bosses, items, etc but that's just a pipe dream for right now so don't expect anything to come from a noob like me who is obviously not the only one who has that dream. Still gotta learn coding and the engine's data. XD
But nonetheless, I look forward to what's to come! Starting off small is always the best direction to take when making a mod or even a standalone game or in this case; a game engine. You can definitely start off with unity and maybe just use updated graphics but keep the rest of the assets like in the 3DS games if you desire, but then after it's complete, you can make a whole new game engine from scratch.