Breath of the Wild 2 will take place in the same Hyrule.

[Dulfite]

Aside from the Lorule theory, I just read one that the corpse is Zant cause Ganondorf never died like that. The hand could be midna or someone from the twilight realm?

The TR never was ended, just cut off from the world of Hyrule, so it could be making a come back here.