Gotta save something for the DLC.
The cutscene confirms a few things. At the end Zelda is wearing her ratty white dress, so all those scenes with her and Link are in the past as many expected. It seems the timeline of those events are...
+Prophecy about Calamity Ganon's resurrection (from who? Seems important if they just decide to go treasure hunting after ONE person says something)
+They dig up the guardians and the Divine Beasts
+Zelda assembles the Hylian avengers to stop Ganon... who hasn't done anything yet? How are they supposed to stop him with robots again?
+Calamity Ganon pops up outta nowhere and shoots goo everywhere, putting the robots under his control. Interestingly, those pillars seem to be from Ganon and not restraints like many thought.
+Everyone DIES
+Zelda and Link run away
+Zelda takes a bath?
+Guardians or whoever find them and defeat Link
+Zelda puts Link in the fridge
+Zelda takes the Master Sword to the Deku Tree
+Zelda confronts Calamity Ganon
This opens up a bunch of questions. Where does Calamity Ganon come from? Who delivers this prophecy? What are the signs of resurrection that causes such urgency? Are they supposed to punch Ganon to death with robots? What are these pillar things? Why is the Master Sword messed up in the past? What happens to Zelda when she confronts Ganon? I guess she halts him in some way since the world isn't destroyed, but then who is modern day Zelda? Are the present day champions the same as 100 years ago, ancestors, or just different people?
I think it's a good start to the adventure. It introduces key ideas while also leaving many answers waiting to be discovered.
So far the details have been fitting rather nicely with the legends of the Imprisoning War from ALttP. This cutscene complicates things, but allow me to break it down.
ALttP tells the tale of The Great Calamity (English localization used "Cataclysm" but its the same word in Japanese). This cutscene has King Rhoam refer to The Great Calamity.
King Rhoam Bosphoramus Hyrule:
- ”The Great Calamity was merciless...
It devastated everything in its path, lo, a century ago."
According to ALttP, The Great Calamity began when Ganondorf invaded the Sacred Realm and obtained the complete triforce.
ALttP translation of Japanese version:
- ...do you know the prophesy of the "Great Calamity"?
I heard it like this...
'If one with an evil heart claims the Triforce, a "Hero" will unfailingly appear, and shall defeat the one who will become the origin of this "Great Calamity".
However, if the "Hero" were to fall, the world would be engulfed by the evil-hearted one'...
As you can see, this also involved a prophecy about dealing with The Great Calamity.
The legend of the imprisoning war also repeatedly mentions Ganon's Malice, which the NoA localization mistranslated as his "army".
King Rhoam Bosphoramus Hyrule:
- ”To know Calamity Ganon's true form, one must know the story from an age long past.
The demon king was born into this kingdom, but his transformation into Malice created the horror you see now."
ALttP translation of Japanese version:
- Ganon acquired the Triforce, but no one knows what Ganon wished for.
However, Ganon's Malice advanced even to the land of Hyrule.
Greedy persons vanished into this powerful gathering smoke.
Dark clouds always covered the sky, and unlucky incidents; one after another, also attacked Hyrule.
The king of Hyrule sent for the seven sages living in Hyrule, and the Group of Knights, and ordered them to seal the source of evil.
------------------
However, the situation was urgent, and Ganon's Malice was enclosing on the royal palace.
So this lines up, too. The sages had a prophecy about Ganon returning to Hyrule as The Great Calamity and the bad stuff was happening. The King instructed the knights to look into stopping it. Ganon's Malice invaded Hyrule and encircled the castle.
Now here's where things get complicated. The legend the King mentions about the previous Princess Zelda and Hero says they fought Ganon with the guardian army and sealed him. It's possible that in the Downfall Timeline that the Sheikah got involved when the Hero of Time lost the Triforce of Courage to Ganon and they combined forces to seal him.
Regarding where Ganon came from, his Malice invaded from beneath Hyrule Castle. As you know, in ALttP a portal to the Sacred Realm exists at Hyrule Castle. The King says Ganon was resurrected, and we've seen that Ganon has a cult of followers that are likely involved in that happening.
Regarding what Zelda does when she confronts Ganon, we've seen her bathe in the springs from Skyward Sword:
And when Zelda did that in Skyward Sword it was to prepare a sealing spell that she used to seal Demise for hundreds of years by freezing herself in a crystal:
The tapestry also appears to be depicting this:
https://youtu.be/Uxjh_qnRGmI?t=3m18s
but with robots.