No, I totally understand the Jailer is the big bad of this expansion but who is the jailer. I've seen many people speculating that it could actually be Terenas, Arthas's father. There was also another name mentioned that I can't remember right now that it could also possibly be.
There is also the issue of Sylvanas's ultimate plan. I'm hoping we don't get something as trite as her being a double agent (which has been mentioned by a few people) and that she is straight up evil. I also want her to have another plan in mind. Maybe even an attempt to usurp the power of The Jailer and become the ultimate evil. I don't want a story where all of a sudden she becomes good and we see her redemption. We have enough redemption arcs. Just allow her to be pure god damn evil.
I love the linear aspect of it as I feel like it will allow people to keep better track of the story. I started playing this game with all intents of simply looking at end game content but if I'm being honest with myself, I'm never going to be a mythic raider. I may eventually be able to push some high keys but I need to really pick a class and learn that class in order to do that. I'm working on that but while I work on that, I find myself sucked into the lore of things. Unfortunately there is so much I've missed since I only came in Legion, and the stories were so disjointed because of how you could progress through the game. I've managed to learn things through reading articles and such on WOWHEAD but I feel like it would be so much easier if the game was a bit more linear. Once you're 120 then by all means, open it up to everything but while you're trying to track the story, I like the feel.
The tower for this expansion looks amazing. The fact that I can solo it is great for me. I mean I have a couple friends that I like to play with but they're not into pushing keys and shit like that, so I feel like this will give us something we can do together. I'll want to do it to build my legendaries for keys and they'll want to do it for....well just because they like the game.
I also like that even though little is known about the expansion so far considering we have about 10 months before we see it, it feels like they're listening to the playerbase somewhat. I mean players need to understand that the game cannot be balanced around Mythic Raiders. They make up about 5% of the game. But they look to be trying to find a happy medium with this xpac and as long as they aren't just paying lip service, it should be amazing.
Edit: Mure'zahn or however you spell it is the other name!