This is basically the summary of this thread from the last two weeks. 100% valid stuff right here. Turalyon denying Anduin the throne? Sure. Not like we talked about this scenario a week ago and now it's a "leak".
Besides of the setting everything for 10.0 in this leak sounds horrible as well.
Oh and it would be ridiculous if we kill / defeat the Jailer in Shadowlands, I mean he is SARGERAS POWER LEVEL!!! SOOOO POWERFUL AND IMPORTANT CHARACTER!!!
for one expansion
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Stuff in Chronicles =/ stuff in game. We maybe have 1/10 of what's written in Chronicles in the game. I already told you (if you're Highlord just renamed, at least you're acting like him) that the Garden of Life stuff is neat and interesting lore for novels or Chronicles, but in the end irrelevant for the game or the player. Could it happen? Sure. Will it happen? Just look at Emerald Nightmare. Degraded to an awful raid although so so so so much lore was behind that.
Edit to further iterate on this: my problems with a Gardens of Life setting in the next content patch is the "out of the blue" character for it. We have like one sentence about Gardens of Life in game. That's hardly hinting at anything. I don't remember one single content patch from the last years that hasn't been heavily teased or implied. Isle of Thunder in 5.2 maybe? I don't remember correctly. Endtime in 4.3? Gardens of Life were mentioned once and they will blow this up and make it an entire content patch? When Nazjatar, Nyalotha and Emerald Nightmare, stuff that was teased for over a decade, was just a content patch as well?