Alright so if you have seen some of my speculation pieces before, you might be aware of my original piece centered around the Bootstrap Paradox. A Speculation piece around the scientific theory that Yusei Fudo is the pioneer of Accel Synchro, due to the fact Zone had to learn it from his research for him to indirectly teach it to Yusei in the course of events we see in the Anime.
This predicament is also known as “Who wrote Beethoven’s 5th.”
We know that this act created an entirely different timeline from the original line of events, simply due to Z-ones Historical records. We see in the original timeline that Yusei participated in tournaments with Aki and Hunter Pace something that does not occur due to Z-one’s interference. My conclusion to this speculation was the following, due to Z-one’s Meddling he completely altered the original line of events, in which Z-ones future took place in the original vision for Yugioh 5Ds with Rua being the 5th Signer and Crow inevitably becoming the final boss in the Dark Signer arc, a plot in motion before Blackwings blew up in popularity.
This also explained Jack Atlas’s absence in the historical records as the final triple duel against Goodwin wouldn’t have occurred leaving Jacks character development unfinished.
Now that I’ve got that out of the way lets delve into the timeline.
First things first we know for a fact the Yugioh Timeline pre V-rains looks akin to this:
DM- GX - 5D’s - Zexal - Arc-V
No its not intentional that this is in the order of release, that is the timeline; we can safely say now that there is no split. How? Zarc. Due to Zarc possessing all 4 summoning mechanics in the UNITED timeline before everything was segregated we can now confirm that Zexal takes place After 5Ds and not in a split timeline.
Clearwing Synchro Dragon and XYZ Dark Rebellion Dragon cannot co-exist in a universe if both 5Ds and Zexal took place segregated from one another, note this is in the UNITED timeline before the dimensional split not after. If Zexal and 5Ds were split through a timeline then only one of those monsters could be in the possession of Zarc not both.
We also know Zexal has to take place After 5D’s and that the old Man isn’t Yugi Muto, how do we know this? Tetsu Trudge. Trudge is the embodiment of the confirmation as he is the same Tetsu that bullied Yugi Muto, if Zexal took place BEFORE 5Ds and after GX Tetsu would either have recollection or the XYZ summoning mechanic would have existed in 5Ds.
So this begs the question, why are Synchro’s absent in Zexal? I have a few theories based on actual events in the series that aren’t rooted in wacky time loops, and I will present a few of these below.
1. The old Man in Zexal is not an indication of 5Ds taking place in a separate timeline.
This one is pretty easily debunked, the old man is a teacher and he crafts a new statue for every student that concludes their training. For all we know the amount of students he has taught can be linked to how many statues exist in that room aka not many.
Its entirely plausible that due to the sheer amount of legendary monsters whom exist in the anime verse, he just hasn’t gotten round to crafting a Synchro Monster or Stardust Dragon.
We see so many monsters that represent many different legendary duelists from the first 2 eras, from Yugi, Kaiba, Joey, Judai, Ryo etc. We can’t confirm the existence of history through a man who enjoys crafting statues, especially when later information comes out supporting the fact that 5Ds and Zexal have to take place within the same line of events.
2. The Synchro mechanic was abandoned/outlawed.
Theory number 2 is my personal opinion as to what I believe actually took place and it does have some merit towards it. This theory takes place after the events of 5Ds, Yusei’s Fortune program succeeds in preventing a second Zero Reverse sparing the World from Z-ones fate.
However due to the constant looming danger of Z-ones original future, as a precaution overtime the Synchro mechanic was abandoned. We know this is possible simply due to the fact it has already happened before; in Z-ones original future Antinomy was outraged at the decision of Synchros becoming outlawed, passionately proclaiming what Synchro Summoning stood for under Yusei Fudo.
In short we have seen this very situation occur already in the series so this is what I truly believe to be the case, as this would pretty much confirm why we see no mentions of Synchro’s in Zexal and the absence of culture such as Riding Duels which are synonymous with the Synchro summoning mechanic; out of fear that the end of the world could be the result in the continuing utilization of those monsters.
This allows Synchro’s and XYZ to co-exist later down the line in the united dimension, the mechanic being rediscovered and brought back over the course of a few decades-centuries. Which leads me to my final point.
3. Synchro’s were merely lost to time
You know how we never see Rituals in 5Ds? Does that mean Ritual summons never actually existed? No, in this circumstance we could always see a future were the Synchro mechanic simply faded away in favour of XYZs or they were deemed obsolete.
The point of this piece is to simply convey the following: Just because they make no mention of these things in the future series doesn’t mean they didn’t occur all in one timeline. We cannot be certain just how wide the gap of time is when it pertains to how these series all link up with one another, for all we know Zexal could take place centuries after 5Ds in which case a lot of things can change throughout that gap; we also cannot say for certainty that these drastic theories of time loops and split timelines are canon when future evidence straight up contradicts these and states them to be false.
Yes, all of my theories are grounded by comparison. However they are tailor made to support and are foundered on past events we already know to be true from the previous series, such as the outlawing of Synchro as per Z-ones original future. Overall they have much more credibility and evidence behind them that supports the united timeline speculation than the general misconception of “Zexal and 5Ds are two separate timelines.” Something we now know has to be false thanks to the existence of Arc-V.