March on Quel'Danas ending Cinematic Implications: SPOILERS INSIDE

See here

https://www.wowhead.com/news/march-on-queldanas-raid-finale-cinematic-massive-spoilers-381043

So I wasn't a big fan of this occurrence. Sylvanas was previously set up as a potential player, but she didn't really... do anything. And Xal'atath once again laughed and disappeared without revealing much. Hopefully the quests afterwards deliver something slightly more satisfying.

However what I found much more interesting is what she has to say about the Shadowlands not being what they seem. I have always hated the idea that we've seen the afterlife, and we know what it is. I also hate that we can travel back and forth seemingly at will (although it exacts a toll). With Sylvanas's previous repeated mentioning of it being too 'ordered' it seems likely that the Shadowlands may not be our genuine afterlife.

My theory is that the Shadowlands is just another titan engine designed to trap souls and convert them to energy for their own ends. The Eternal Ones may have thought they were on par with the titans, but they are just more Titanforged constructs working as cogs in the Titanic apparatus of infinite imprisonment and enslavement.

Sylvanas has seen it, and she is peeling away at the edges of this. We will see this blown wide open in The Last Titan.