Multi-level Dungeons:

• Windrunner Spire

• Magister's Terrace

• Murder Row

• Den of Nalorakk

Max-Level Dungeons:

• Maisara Caverns

• The Blinding Vale

• Voidscar Arena

• Nexus Point Xenas

You can find more information about these on Wowhead.

• The Darkway

• Twilight Crypts

• Atal’Aman

• The Grudge Pit

• The Gulf of Memory

• Parhelion Plaza

• Collegiate Calamity

• The Shadow Enclave

• Den of Echoes

• Shadowguard Point

• Sunkiller Sanctum

• Torment’s Rise (Nemesis Delve)

Brann has hung up his hat and will no longer serve as the Delve companion in the Midnight expansion. Instead, players will uncover the secrets found within these new Delves with a new Delve companion, Valeera Sanguinar. Valeera is an iconic Blood Elf Rogue that once served as a Champion in the Rogue Class Hall in the Legion expansion. Her work speaks for itself, with some saying there is no finer assassin in the world of Azeroth. 

You can find more information about these on Wowhead.