If you saw the trailer for the sequel, we saw what appears to be the mummified corpse of Twilight Princess's Ganondorf.
If you remember, in Wind Waker, Ganondorf's body turns to stone and is then erased with the rest of Hyrule (except apparently the Master Sword).
For the original timeline, I heard Ganon turns to ashes.
Therefore, the only original body of Ganondorf left intact from his first death in any timeline is Twilight Princess's Ganondorf. If I interpret the sequel trailer correctly, then the sequel at least has to be set in the Child Timeline only, as neither of the other ones has a Ganondorf body left intact.
Unless, Ganondorf reincarnated two times in both, was killed then with his body left intact, then reincarnated again before becoming Calamity Ganon.
Otherwise... They previously said Breath of the Wild is set separately in all three timelines, but what if they decided it's just the Child Timeline now? That with Hyrule gone, Ganondorf never reincarnated in the Adult Timeline, and for the original timeline, he'll probably return again sometime?
Can someone clear this up for me once and for all?