In a recent interview for the Final Fantasy VII Remake Ultimania Guide, Tetsuya Nomura dropped some huge lore bombs. Among them was the very strong hint that the Whisper bosses at the end are Kadaj, Loz and Yazoo from Advent Children. The descriptions revealed by the assess materia, for all three, state that they are defending their timeline.
Later, the party catches a glimpse of events from Advent Children and Nanaki says “this is what will happen if we fail here today”.
Two paths that fork from the point of departure at the end of FFVIIR are discussed. One openly, the other by implication. Advent Children was a sequel to the original Final Fantasy VII. The path of the original that proceeds into Advent Children is what Nanaki said would happen if they “failed”. The path revealed by implication is what the party embarks on after they appear not to fail.
Kadaj, Loz and Yazoo are protecting the timeline that shaped them as they were in Advent Children. Three of the Whispers at the end are meddlers from outside of the timeline.
What about the giant Whisper Harbinger that looms in the background during that fight? It looks a hell of a lot like Sapphire Weapon. Why would a Weapon be intruding into another timeline?
The planet created the Weapons to defend itself in the event of an existential threat. They were originally created to combat Jenova (according to Ifalna) but so long as Jenova exists in an undead, “viral” state, they can’t go away. The planet will also lash out at any soul that’s been exposed to Jenova as it passes through the Lifestream on its way to its next existence (Geostigma).
It is intuitive to think that a Weapon is attacking another timeline because it poses an existential threat to the planet in its own timeline. Aerith, in her dialogue describing what she knows or has deduced about Sephiroth, says that she thinks that he has good intentions even if his actions are destructive (“he would probably say he would do anything to protect it”, loose paraphrase). Later, after the final boss fight, Sephiroth tells Cloud that he wants him to exist for as long as he himself does.
In the original game, Sephiroth never said or did anything that would suggest he cares about the planet. Nanaki’s remark implied that the timeline of the original FFVII was a worst case scenario, yet in the chronology (which ends with Dirge of Cerberus, if I’m not mistaken) nothing seems to back this up.
If Jenova ever fully corrupted the Lifestream and turned Gaia into a new Meteor, we haven’t seen it yet. Maybe this is a mystery that the Remake series might elucidate in the future.
If Sapphire Weapon is penetrating into a new timeline, it is equally possible that it’s either attacking Jenova or defending the planet in its own timeline. If Jenova ever succeeded in corrupting the Lifestream, though, would the planetary Weapons continue to distinguish between it’s wellbeing and attacking Jenova?
And if the Whispers are pure, spiritual agents of destiny, why do they seem beholden to Sephiroth? Why, at the end of FVIIR, does it seem like both Sephiroth and the Whispers are protecting the same thing?
This theory depends on the ultimate fate of the original timeline. Either Jenova “won” in the end, during some far future event we just haven’t seen, or Jenova was somehow subtly “winning” the whole time. Either way, the Gaia of the original timeline does not seem to exist.
The behavior of the Whisper Harbinger and the three boss Whispers begins make sense in this situation. Kadaj, Loz and Yazoo have no other existence except for the one that happened in the original timeline. They want to “enforce” the chronology that happened in their own past because it’s the only way to guarantee their existence in a new timeline. Sephiroth, Sephiroth clones and Jenova attempting to shape the events of a separate timeline to conform to their own only makes sense if the world they originated from doesn’t exist any more.
An event like that would also explain why Sephiroth wants to protect Gaia and why Aerith sees him as a threat in spite of that. Jenova is a colony organism that exists by spreading its cells into more bodies. When such a body dies and it’s soul passes into the Lifestream, the essence of Jenova is now mixed up in the planetary transmigration cycle. Jenova exists through “possession”, almost like a demon whose cells can be both spirit and matter. If Jenova “possessed” every body and every soul on Gaia in the original timeline, then the Lifestream itself would be possessed. The Lifestream is the spiritual existence of the planet, so even beings like the Weapons would end up enslaved. (That Sapphire Weapon was originally right next to Sephiroth in the Northern Crater might also be a factor)
If the Gaia in that timeline ceased to exist, though, Jenova would be saddled with a Lifestream with no planet. The existence of both Jenova and Sephiroth would be dependent on that Lifestream, so it makes sense that they would stop at nothing to protect it. If you have a Lifestream with no planet then you would want to find a new one. In a parallel timeline, for instance, within the same planet it came from.
This possibility also clarifies what Nanaki meant when he said “This could very well be her last line of defense, it won’t be easy.” If Jenova would “burn out” a planet while possessing or consuming it, the search for a new planet to move the corrupted Lifestream into would be the last line of defense.
If the Whisper Harbinger actually is a Weapon that (like Kadaj, Loz and Yazoo) originated in a doomed timeline, what about the rest of the Whispers? If the world was destroyed in that timeline and the displaced souls are pushing through to the timeline next door, there’s gotta be more than three. Maybe all visitors from outside your timeline look like Whispers in this fictional world.
I suspect that the Whispers are not agents of destiny but migrating souls desperate to create a timeline that will bring them into existence. That would mean making sure everything happens the same way it did last time. Not a single detail can be out of place because every single detail probably played a role, ala “butterfly effect”. That would also explain things like resurrecting Barret after the Sephiroth clone skewered him- he’s not allowed to die like that because he didn’t the first time around.
This begs another question- the last boss fights in the game imply that Sephiroth and the Whispers are working toward the same end. The whole theory I just unpacked would also support that. However, Sephiroth and Jenova need to shape the neighboring timeline to resemble their own in order to preserve themselves. If the old timeline is recreated in every detail in the new one, though, both universes might end the same way.