Patch 5.4 Trailer, Predictions, and Hints

[RyuDragnier]

I expect this not to happen. As Hydaelyn would want to have all the shards resplit to prevent reviving Zodiark (after his 2nd defeat). This theory only works if Zodiark can never be summoned again, but we all know primals can always be resummoned...

It's very likely Zodiark will be gone for good because all who will know of its existence will be gone or will refuse to ever speak of it to anybody else (us and the Scions). Plus at the end of 5.3, it's mentioned that "the final battle for the fate of this star" is approaching. Meaning that's it, we're not getting any more "fate of the world" scenarios after this, so Zodiark is permanently going to be dealt with, it's not going to come back after this.

[Kesey]

It's very likely Zodiark will be gone for good because all who will know of its existence will be gone or will refuse to ever speak of it to anybody else (us and the Scions). Plus at the end of 5.3, it's mentioned that "the final battle for the fate of this star" is approaching. Meaning that's it, we're not getting any more "fate of the world" scenarios after this, so Zodiark is permanently going to be dealt with, it's not going to come back after this.

We can hope, but there is no evidence that all who know of his existence will be gone after the final battle of 6.0. All the narrative has promised is the final battle for the fate of the star, not who continues on afterward.