Would probably want Xenoblade Chronicles remastered the most, but that wont happen. They already did the 3D version so I strongly doubt another one would get made, especially since it's a game that really doesnt appeal to the masses.
Mario 64 would be my best bet, it's a game that really needs it as well. Skyward Sword will come eventually for sure. Just not right now considering that BotW is coming out in a wee bit. Metroid Prime Trilogy really should have come on the Wii U as a HD remaster instead of the Wii, would be cool if it happend and if no other Metroid game is on the pipeline I could see it happen. At least the first game if not the trilogy.
My best bet are on M64.







