Blizzard also hasn't said much about what we can expect in 9.1, but I wouldn't set expectations too high. Looking at previous expansions, the x.1 update typically adds more story, a raid or dungeon, and some bigger tweaks to endgame systems. Historically, it's been the x.2 or x.3 patch that's added entire new zones to explore or big new features to get excited about.
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