Beside my theory that Aurene will be caught in a loop, I have another theory that involve the Pale Tree.
Yes, the Pale Tree gave us the knowledge of the Egg, but what's interesting she showed us this vision of the Egg when she was most wounded. The Pale Tree carried this vision until she was most wounded, now I see that as the Pale Tree needed the Egg, needed its light, but first Mordremoth wanted to grab it, and Kralkatorrik now.
You can see the Pale Tree pictured as branches. And Autumn is turning into Winter, then we see the Shadow of Mordremoth wanting to possess the Egg, and then Crystal and Plant magic shatter the Egg.
I think this cinematic was foreshadowing Aurene's death, Kralkatorrik consumed some of Mordremoth's magic, and shattered the Egg, which in fact is Aurene.
But then when you watch the same video back, reversed, now everything comes from the view of the Egg (Aurene), and leads straight to the Pale Tree, Aurene renewed in the Dream.
This connection of the Dream and Aurene is unbreakable, it looks like the Pale Tree and Aurene must just keep closing to one another, and the only way they can unite, is by death.
Winter woods showed in the beginning means that something in the Pale Tree died, and the crystal mixed with plant magic shattered the Egg.
What's a wonder is that the Dream separated from the Pale Tree, and shared the wisdom with Caithe, so the Pale Tree was surprised that the Dream didn't share Caithe's new Wyld Hunt with her. And Caithe also got the role from the Dream.
And I think Caithe's true role was to connect Aurene with the Dream, Caithe was the key to open Aurene a path to the Dream.
It's been very interesting that Fear not this night was so oftenly and silently introduced in Season 4. And the lyrics of Aurene, Dragon Full of Light also made me thinking, they have hidden key words.
Aurene, Dragon Full of Light
Aurene, Guide Us Through the Night
Rise Up Fearless, Lead Us with Your Sight
Fearless = Fear not
the Night = this Night
Dragon of Light - Who needs the Light? - We need the Light, we need Aurene!
Rise Up = Ressurect
Fear not this Night - Fear not the Death, the light inside you will guide you like stars to a new daybreak.
I think we are heading to the point when Sylvari are returning on the front page, because this race even though full of darkness and nightmares, believed in hope, and hope can be powerful, but also dangerous; believed in new daybreak, even though they knew what's night.
Glint's death began the Legacy, first key to the world in peace, Vlast's death gave Aurene the sense of death, what's death is, second key to the world in peace, Aurene's death opened the final key to the world in peace, and I think those three will unite with the purest hope now - the Dream. Three of them united with the 4th crucial entity - the Pale Tree, that began the Hero's path through courage, war and loss, and those three components will prepare us all for a new beginning.
The repercussion of this Communion will be the creation of new Sylvari, that Caithe began.
The Dream is the Key.
I think the next map will be in Tarnished Coast, the final battle against Kralkatorrik will be the Battle in the Dream.