I still don't think that Breath of the Wild takes place at the end of every timeline. I'm firmly in the Child timeline camp. The only way I can see it being at the very end of a bunch of timelines is only if it is at the end of the Hero is Successful timelines (because I don't believe there are any mentions whatsoever to anything on the Downfall timeline, correct me if I'm wrong), and even then pretty much everything about the Adult timeline would have to have been forgotten and replaced with stuff from the Child timeline, such as Ganon and the very existence of Sheikah (who only appear in the origin and adult timelines). To my knowledge, the only reasons people seem to think the Adult timeline has anything to do with Breath of the Wild are the Koroks, Rito, and the salt mentioning it coming from "the ancient sea." The last one is kind of a stretch, and the Koroks definitely could have descended from the Kokiri in the same exact way they did in Wind Waker (in fact, this is almost a certainty). The only strange one is the Rito, because the only other game they appear in is Wind Waker where they evolved from the Zora. However, there are Rito engravings in Twilight Princess, indicating that they did exist alongside the Zora even at that point. It is certainly possible that they did come from the Zora, just in a different way.

@beardalaxy Yeah, the Adult Timeline doesn't make sense. Either the new Hyrule in Spirit Tracks also ends up in the same fate in BoTW or the Korok's have successfully did their duty on creating new land. In either case, the ruins in the game are NOT the same ruins from the other timelines.

Downfall Timeline doesn't make sense either. In that timeline, the Gorons left Hyrule to the lands in the Oracle games and the Zoras ended up becoming hostile River Zoras. I remember someone showing that if you flood the lower elevations of the BoTW map, it vaguely resembles the world map of Zelda II.

I also really don't get why it needs to take place 10,000 years after the previous games. That is a HUGE timeskip. I know it's all fantasy but having the same civilization, races, etc all in the same form for that long doesn't make sense to me. The Zoras and the Rito are the only ones that seem to change during that time.

@xianc78 i agree, 10,000 years is way too long. they probably did it more or less to just sound cool lol. a few hundred years is long enough for plenty of stuff to change and enter mythical status. 10,000 years is a super long time. perhaps 1,000 years would have been better (which is what PSO2NGS did actually lol).