I don't think they'll kill off Ganon for good on the DT. His constant returns are a big part of that branch from a thematic perspective, and they already did so on the AT.
But yeah, that makes sense, and becoming Calamity Ganon is probably the only way Ganon could free himself, as his body is...
I agree with the general point of this post, but I want to point something out:
Demise is not actually Ganondorf's reincarnation.
Now, I understand why English speaking players widely believe this; the NoA localization mentions the whole thing about, ''an incarnation of my hatred'' and ''I...