While it's not confirmed, it is extremely unlikely, seeing as Hyrule was washed away at the end of Wind Waker, and New Hyrule was established by the time of Sprit Tracks... the chance of Hyrule being restored with no evidence of New Hyrule being carried over is slim at best.Source? If we believe that it isn't in the Hero of Winds timeline even with the presence of rock salt from an ancient sea (recently confirmed that this is by far the latest game in the timeline), rito, and koroks, we have to admit that there is also substantial evidence for each of the timelines even if we don't agree on which one it is. Again, legend timeline outlook here.
Plus, the rock salt, Rito and Koroks are not overly strong evidence in favour of the adult timeline, as they could all have other explanations... and the presence of both Rito and Zora actually conflicts with the adult timeline.
But this doesn't rule out the adult timeline entirely... as I mentioned before, a timeline split within the adult timeline could avoid these problematic details.