The Quadratum being planned since day 1 is So Much more important than you think:
Everyone knows the creator of Kingdom Hearts has always planned for things ahead of time but for something that was recently added at the final game to be thought of since the beginning is even crazier. It would make sense to be thought of around kh2 or BBS and have plans for it, but this early is actually very interesting.
And there are so many hints and things that could relate to this.
For example the unreality being stated in regards to the world that never was. Ansem often used the terms unreality and fictional world in reference to things, however, people just assumed it had to do with The World That Never Was for the most part.
Xehanort did create TWTNW from a memory of another world and TWTNW was never an actual place or city. It's probably why the sea salt trio along with the other nobodies were often in Twilight Town. The other world could be quadratum.
That is in KH2, but let's take a look at the very first game.
The first game has the opening line, I've been having these weird thoughts lately. Like is any of this for real or not?
Alone the line could refer to the being in a world that makes actually be fake. However knowing that Yozora also says this line at the end of Re:Mind and that the quadratum was thought of since day one makes it so much more important.
This line refers to quadratum or Sora's world. Quadratum is said to be a fictional world but what if Sora's world was like that instead because from Sora's perspective Quadratum is fiction.
Now when taking a lot at the beta trailer of kh1, there are a lot of lines that relate to kh3 and beyond.
First we have the opening quote which I already discussed, then we have "Your body, your soul, your whole existence.. they're all going to disappear." This refers to Sora going to quadratum at the end of kh3, this hint being planned at the start is just something else.
Next is another line about saving Sora and Sora leaving and we have to question why. There could have just been random lines but with the knowledge of Yozora and Quadratum being there since the beginning it's mostly likely having to do with that.
Now in the secret ending of KH1, we have a moment where phrases pop up and one of them is A world between= forgotten world The gathering and if TWTNW actually has to do with Quadratum instead it would makes sense for it to be a forgotten world from a memory of Quadratum that Xehanort had. The opening of kh2 A far off memory that is like a scattered dream. Xehanort had a dream and wanted to change the world where he would have 13 lives to fix it and a 14th to finally see the world — the world where he saw was quadratum, also there is a possibility another version of Xehanort lives in Quadratum
And finally I recently saw a part of the KH1 Ultimania where there is a statement from Tetsuya Nomura that the words that appear in the opening was originally going to be said by a certain character.
Now in KH3, Yozora says those exact same lines and a lot of them point to Yozora which is why I have the belief Yozora has been at the beginning for a long time.
And finally the kh3 opening line— They can take your heart. Cut you loose from all you know. But if it's your fate...then every step forward will always be a step closer to home.
If Sora says if it's your fate to be cut from everything you know which refers to going to quadratum. Then he says if that's the fate it will be a step forward to home cause what if being home is actually Quadratum because it's not actually fiction but the KH worlds are fiction.
Since to KH people they know of their worlds but what if Xehanort figured that out. He was researching and studying for awhile after all and Ansem did seem to know of an unreality.
Cause if it's actually the case, and if the real reason they can cross into datascapes such as Tron, Jimminy's Journal and a fake versions such as Twilight Town and Daybreak Town; and because of a book of prophecies that foretold everything which could have been created by someone in Quadratum.
Since Yozora seems to know about this and is going to actually be way more important than some people originally thought. He understands that his world and Quadratum is an unreality which probably means it is another reality and make their world become fake.
There are still so many questions and so many theories that it remains endless, is the KH worlds fiction to them just as Quadratum is a fake reality? Are these hints actual hints that relate to the Quadratum really being there or are they just unsolved questions and theories.
But all we know is that the ideas for Quadratum and Yozora have been ideas since the beginning.
