I’m genuinely curious what in this expansion makes you think next will be the cosmic realms of Order? We know Blizzard want to keep the story a bit more grounded as opposed to cosmic due to feedback, a least for a little while.
Going off subtle hints that we usually tend to see in expansions, the likely contenders are looking like one of Avaloren, underground Azeroth, Tel’Abim, South Seas or Ancient Kalimdor. With Emerald Dream being a more overt possibility if it isn’t patch content.