the green circle isn't a circle. Its actualy a dragon eating its tail wich represents infinate hinting that the whole history of zelda and timeline will repeate itself. Link even gets a new arm and in skyward sword that same, exact arm is in the toilet. even though the hand is in the toilet link is still dead and the spirit who gave him that hand is too but the hand isn't, letting the spirit freely use his hand. There is even a hyrule and depths in Skyward sword Showing that this was not the begining of time and far from it becuase it was 100 years after tears of the kingdom. in every zelda game there is a new link and zelda.
Thanks to a yt vid and me and my brother next: zelda timeline maybe