Throughout Battle for Azeroth's development, we've gotten tidbits of the Burning of Teldrassil storyline, culminating in Malfurion building a wall of wisps to keep the Horde out, Sylvanas causing chaos with Azerite to distract the wisps and break down the wall, and Malfurion facing Saurfang directly, only losing when Sylvanas shows up too. He's seriously wounded and Sylvanas orders Saurfang to finish Malfurion off, but Saurfang spares Malfurion, allowing Tyrande to carry him to safety.
While we've datamined lots of incidental dialogue, several mysteries remain--who burns the tree, and why is Sylvanas attacking in the first place?
The broadcast text from today, while short, can possibly answer why she is attacking. She hopes to occupy Darnassus to regulate the flow of Azerite, as she fears Anduin will use it to attack the Horde. To ensure the citizens comply with the occupation, she will break the spirits of the citizens by killing Malfurion as part of her campaign.
However, this raises several more questions--if she wanted to occupy Teldrassil, how did the tree burn? Was she responsible?
"Time is not a luxury we possess, but I respect your desire to know more.
THIS has forever altered the balance of power in Azeroth.
Deposits of Azerite are being located across the world, $n. Though we do not yet understand its full potential, it is clear that this substance has vast destructive capability.
What will war look like in twenty years? In a hundred?
How can the Horde hope to defend its borders if the Alliance controls the flow of Azerite?"
"What IS certain is that the Alliance will use Darnassus as a safe harbor for funneling Azerite into the Eastern Kingdoms. Anduin Wrynn will build powerful new weapons, and sooner or later he will turn them upon our homelands. First he will strike at the Undercity and Silvermoon, then his gaze will fall upon Kalimdor.
For the sake of the Horde's future, we must be the first to act.
By occupying Darnassus, we will control the flow of Azerite and ensure it cannot be used against us. The Alliance will dare not attack its own city for fear of harming civilians.
With a single stroke, we will guarantee generations of peace."
"The kaldorei will defy our occupation... unless we break their sprits.
We must inflict a blow that will show them what is at stake. They need to lose something... someone... in whom they have absolute trust and faith. A symbol of hope.
Malfurion Stormrage must die."