Well to kick things off, I'd like state a theory I support on Link and how there are so many different Links :P
Metronomes Ledged of Zelda Theory
Well actually it's interesting and strange in a way.
I guess it could make sence that these men, all named Link, all heroes of there time, all exist in different dimensions.
It is highly possible that there are multiple Links, but different dimensions in which he exists in, so the Link from "Zelda 1 and 2" exists in one dimension.
The Link from "A Link To The Past" and "Links Awaking" is in a different dimension.
But think of this... The Link from the "Ocarina Of Time" dimension was tricked into entering a TOTALLY DIFFERENT dimension altogether, which is the world of Termina. So that explains why the world of Termina is so similar to Hyrule, it is actually just a parallel world of Hyrule.
Now another thought just hit me, maybe the problem with the Termina universe was that it did not have a hero Link existing in it, and it needed one in order for it to continue existing because it was going to be destroyed. So it must be the destiny of the skull kid to bring Link into the world of Termina to save it.
There are of course another two dimensions in which a Link exists, and they are the "Twilight Princess" dimension, and the "Wind Waker" dimension.
Now think of this... Imagine what would happen if all of the Links from different dimensions merged into a single new dimension to fight a new evil force. That would make five Links altogether all in a one dimension.
This might be exactly why there are 4 Links in the story of "The Ledged of Zelda Four Swords". But we would have to assume that story took place before the Wind Waker, either that or the Wind Waker Link is not actually a hero Link.
Any thoughts on this?