The Massive Reply of Doom! Alright, hopefully I get all of you on this one:
TML!! I know you. I'm not going to tell you who I am though. MWAHAHA.
GameFAQs, that's where I remember you from. Yeeeears ago. SSBM.
O_o I hope you're not talking about the GameFAQs forums... because I never haunted those treacherous grounds. But now you've got me darned curious.
Ho man... I wish we could go chat about the good ol' days but I don't wanna hijack your thread here.
Ah, if only. Of course, IM is always an option. Drop me a PM with your contact stuff and I'll try to get a hold of you.
. . .
In short, if I understand you correctly, you believe the Split Timeline. Now all you have to do is prove with canon that the Master Sword cannot split timelines like the Ocarina and you'll have won.

Simple really, the Hero of Time travelled back in time to have his very first meeting with Princess Zelda in the Castle Courtyard. Watching that ending unfold with Zelda shocked and Link welding the Triforce of Courage was so damn beautiful it almost made me cry...
Ah ah ah... not so fast. The Door of Time wasn't open then. In fact, it wasn't open until Zelda was forced to
leave Hyrule Castle. So how'd Link get out of the Temple of Time?

Except the Ocarina of Time can manipulate time without the Master Sword, as shown in Majora's Mask 3-day loop.
Except that Termina is an alternate dimension and that the flow of time can be different there. Next.
Anyway, before I start answering your questions I would like to make sure we're clear that I agree with the topic and was simply nitpicking that it was technically possible to create a working theory while adhering to the strictest level of canon, as long as you use a ton of fanfiction to make up for what you lose by treating canon as law.
Well see, that's actually the problem here. The strictest level of canon disallows adding "fanfiction" to the timeline. What I'm saying is that you cannot assume what you cannot see, that the only thing that can be used to string together are the raw facts from the games. Even then, there is still likely some guesswork as it gets rather ambiguous which game comes next and then next and then next, but you can only use raw facts to do it. Fanfiction immediately invalidates canon, and I'm sure that a lot of the veterans would agree as much. (I know I get constant grief from the likes of timeliners for
The Book of Mudora, which is about half and half.)
At any rate, I'm glad you at least agree with the premise, and I have no problem with you playing Devil's Advocate. In fact, that's what I used to do all the time around here.

You'll just have to pardon me that I bite back.

I can't tell you why she is at the castle in the ending, but I can come up with tons of possible explanations that could be used by somebody wanting to create such a theory. For one thing, the castle might actually be a pretty safe place if it's the one thing Ganondorf knows Zelda isn't. It's also possible she received the Triforce of Wisdom, which indicated (at least to Impa) that somebody with an unbalanced heart (presumably Link or Ganondorf) had touched the Triforce. If that person was Link, Ganondorf probably isn't that much of a threat, and he probably has more important things to concern himself with than finding Zelda (who he probably doesn't know has the Triforce of Wisdom.) If Ganondorf touched the Triforce, that would mean the castle was in serious trouble and is probably unaware of how powerful Ganondorf had become, so she may have wanted to warn them. These are all possibilities, though the only evidence for any of this is that Zelda was in the castle, which isn't really evidence considering that's what this is supposed to explain. The point is that it isn't explicitly stated that Zelda never returned to the castle, and we don't really know how long it took for Ganondorf to take the castle after the initial attack (though there is a Hylian Soldier guarding the gate, so it's incredibly unlikely that he took the castle when he stormed it trying to capture Zelda.)
There are all sorts of reasons, but none of them are canon.

This is where the circular logic comes in; you're trying to invent some story to save the timeline, and I actually have no problem with that. Create away... but you can't prove any of it... which consequentially means you cannot prove that I'm wrong.

You see, the article is an elaborate trap. I've restricted you to using game evidence only, so inventing a story around it, even if it's possible, makes you out of bounds.
However, despite that, let's pretend for the moment anyway. Let's look at the flow of time from Zelda's perspective. Ganondorf storms the castle, and Impa rushes to Zelda, grabbing her and fleeing the castle, escaping just in the nick of time. Impa rushes Zelda who knows where, trying to keep Ganondorf off their backs. Some amount of time later, the Triforce of Wisdom comes to Zelda, and Impa sees this. Which is the logical conclusion: Link, someone who is relatively balanced, or Ganondorf, who is rather imbalanced? The choice is likely the latter. Now, Zelda at this point may want to go back to Hyrule Castle Town and warn people. I would say that Impa would severely frown on the idea knowing how protective she is of Zelda (we have canon proof of that) to the point of forbidding it. She knows that Ganondorf is out there, and here's Zelda with one of the Triforces that he's going to be looking for. Not a chance she'd let Zelda go. After all, if the castle wasn't safe then, why would it be now? Even if she did, Zelda wouldn't be standing at the window next to the castle; she'd be frantically hunting people down. No, the scene at the end of the game doesn't seem to make sense given the situation... unless you can explain it better than I, of course.

Sorry, since you didn't mention the seeds I assumed you were only counting quotes and events as canon, not game mechanics. I can't really explain the bomb/arrow/rupee or seed things, I just basically ignore them as game mechanics.
Fair enough. Whether you call that canon or not... well, that could be a toss-up.
The motivation is that Ganondorf can be defeated with the aid of the Master Sword, which is on the other side of the Door of Time and can be wielded by him now that he's aged 7 years. I'm figuring the assumption that Link would return and save Hyrule from Ganon as soon as he was old enough is a pretty safe assumption to make. Really, if you're worried about assumptions, Zelda being in the castle is what you need to be worrying about. Of course, with so many sequels being made for Ocarina of Time, I wouldn't expect to see too many timelines actually using the Time Loop Theory.
If you allow Link the ability to defeat Ganondorf before the proper time, then you've just killed the Future Predestination Theory as is and shifted to Future Erasure... So do you believe it was Zelda's intent to send Link back in time only so that he'd have to defeat Ganondorf AGAIN? Pretty crummy way to have Link "regain his lost time."

But you are right, the focus is on Zelda. Truth be told, I was actually feeling your idea out to begin with. It's an idea that I haven't heard before, and I wanted to make sure that you had filled in the blanks on your own before I started pressing you full court. This way I knew the details I need to drill home later on.