This post contains spoilers for the intro to Shadowlands.
The introductory sequence to Shadowlands involves you and the Ebon Blade going to the Maw to rescue Thrall, Jaina, Baine and Anduin. It's a pretty good questing sequence, with some nice moments for all the cast members. Especially Thrall's search for a weapon.
The Maw has some very weird bridges too, with rows of pop-up spikes running length-wise along the bridge. That architecture doesn't make a lot of sense, but the AI programmers did a nice job of having the NPCs line up behind you as you run down the channel, and then spreading out again once you're off the bridge.
In any case, you escape the Maw, while the NPCs cover your retreat and are captured again. I guess rescuing them is going to be the main task at max level.
The one concern I have about the Maw is that it isn't very visually appealing. In the intro it was all rocks and grey metal, all browns and grays. If that's the palette, it might grow old fast if we do repeatable content at max level. Argus had a similar problem (though with added green for fel).