Ok, so I was walking around Skyloft when I noticed something very interesting. At the very top of the wooden steps near the Knight Academy, right at that little doorway that leads to the Statue of the Goddess, look up at the ceiling. Three of the six symbols of the Sages from Ocarina of Time are there. Now if you go down to the Sealed Grounds and to the doorway leading into the Sealed Temple, look up again. The other three symbols are there.
Now, at the end of Skyward Sword, the island the Goddess Statue is on falls to the ground and covers up the Sealed Grounds, also connecting itself to the Sealed Temple. The symbols of the Sages also end up connecting together. In Ocarina of Time, it is stated that the Sages created the Temple of Time to protect the Triforce from evil. My theory is that the Sealed Temple is the Temple of Time from Ocarina, because of not only the symbols, but the fact that it is where the Triforce once was. When the Goddess Statue falls back down to the Sealed Grounds, the island it's on is where the Triforce it was hidden.
I believe that this means the Sages originally mentioned in Ocarina actually created the Temple of Time before the events of Skyward Sword. Hylia knew that the Triforce was in danger because of Demise and his followers, so she rose the part of the Temple with the Triforce to the sky.
More proof of this theory is the layout of the Sealed Temple. It is VERY similar to the Temple of Time. Look around, you'll see what I mean. Furthermore, the Master Sword even ends up being left in a pedestal behind a large door, which are obviously the Pedestal of Time and the Door of Time, respectively. Not only that, but this also proves that this place eventually becomes the Sacred Grove, and the resting place of the Master Sword in Twilight Princess. The Temple of Time degraded over the years between Ocarina of Time and Twilight Princess, leading to the crumbled ruins of the Temple of Time in Twilight Princess.
Also, in Skyward Sword Hylia created the Goddess Sword and left it for the Chosen Hero. In Ocarina of Time, the Sages are said to be the ones who created the Master Sword. We all know that the Goddess Sword becomes the Master Sword, so I believe that the Sages also helped to create the Goddess Sword for Hylia to defend against Demise's army before the events of Skyward Sword.
What do you all think?