Wrath of Kel'thuzad
As the Heroes from Azeroth reel from the battle against Denathrius and his foul machinations and settle on mending hte internal problems of their chosen covenant the Jailer's plan moves forward.
From Torghast he has schemed to enact a plan that will finally leave him fully able to leave the Maw and enact his reign over the anima-starved realm of the Shadowlands.
Return to Maldraxxus and help the Undying army in their defense against the dread fortress Arthramas and its inhabitants.
Gain more Renown with your chosen covenant and earn further rewards, including a covenant specific mount and new soulbind abilities.
Delve into the dread fortress Arthramas and defeat the 11 new bosses.
Total War: Maldraxxus
A new covenant agnostic storyline. Aid the Undying Army with their war effort and explore the history of Maldraxxus and learn why Kel'thuzad and his master desperately wants what is hidden beneath the Theater of Pain.
More covenant specific quests
Kyrian: Aid the Kyrian in rebuilding from the devastation wrought by the Forsworn. The process of giving Kyrians the power of a Paragon is intricate and soaked in tradition, but who among the Ascended is worthy of the charge.
Venthyr: Aid The Venthyr in gaining the last Medallion from the Stonewright. Delve back into Castle Nathria and uncover the true extent of Denathrius' deception and his plans to aid the Jailer.
Night Fae: Search the Shadowlands for the previous Night Warriors. Secure Ardenweald and find the truth of how the Drust managed to cross the barrier between Thros and Ardenweald.
Necrolords: Gather allies and assemble your mighty army to take back the House of the Chosen from the treacherous Vyraz. Uncover the deepest held secrets of the Primus, and perhaps even a clue ot his disappearance.
Arthramas
The Dread Fortress Arthramas is among the mightiest of the Necropoli constructed in the Shadowlands. Built in Torghast by the Jailers finest craftsmen and helmed by the Grand Lich Kel'thuzad, the Jailer intends to conquer Maldraxxus by force, and at last find the Primus' secret hidden beneath the bone and ash.
Franken
Constructed in the Fracture Chambers by Stitchflesh's most devoted disciples Franken is a true monster beyond compare. Crafted as the ultimate weapon his stitched bosy is composed of only the finest parts gathered from across the Shadowlands.
The Chosen Few
The last remaining members of the House of the Chosen still loyal to Vyraz. Led by the ambitious barons Kerax and Artanis, the champions of Maldraxxus functions as the standing army of Arthramas, and will defend its halls with all they have.
The Great Mighty Slime
Baroness Tayesh was an ever industrious alchemist of the House of Plagues, and a particular master of the creation of slimes. Though killed in the explosion that destroyed her house her foremost creation still lingered.
It cleans armor. It serves mixed drinks. It even sings. And if left to its own devices it will gladly consume the entirety of the Shadowlands.
Margrave Vyraz
Ambitious in life, death did nothing to quell Vyraz' urge for power.
His skills earned him a place in the House of the Chosen. His tactical accumen made him a baron. And his skill at underhanded tricks made him Margrave.
Now only the position of Primus lies between him and complete control over Maldraxxus, and with the power gifted him by the Jailer, Vyraz stands once more in the arena, ready to prove his might in combat once more.
Tracker Yorta
Among the foremost hunters in the Beastwarrens of the Maw, Yorta has grown tired of hunting mere lost souls. Hoping to track more spirited prey he gladly joined Arthramas on its mission of conquest.
Mortal Souls are a rare treat for the Shadowlands, and Yorta intends to hone his skills before the inevitable conquest of the mortal plane.
First Ascendant Kelvanos
Once a Kyrian Aspirant, Kelvanos did not manage to part with his mortal burdens. Sent instead of Maldraxxus his feelings of inadequacy over having failed to earn his wings festered for eons.
Now the Jailer has given him a new chance for wings, and with the skills he learned in Maldraxxus he is a perfect fit to lead the aerial forces of Arthramas into battle.
The Stalker
Among the first creatures to inhabit the mountain of what would once become Maldraxxus, the Stalker has spent eons in unending hunt.
When Arthramas entered Maldraxxus it made the mistake of passing by its den. Now it stalks the darkened hallways of Arthramas, hoping to find a succulent meal.
The Dread Riders
Curated by the jailer since his imprisonment these four riders have spent eons training in preparation for leading the Jailers armies.
The Grand Necromancer
The entity known only as the Grand Necromancer has long been a closely guarded secret in the House of Rituals. Stolen by Kel'thuzad he intends ot use it to house the energies needed to free the Jailer from his prison.
The Endless Army
Long before the arbiter sent souls to Maldraxxus to create an army the defences of the Shadowlands was seen to by The Endless Army, a grand necormantic creation made by the Primus.
Though ancient the powers contained within could potentially soothe the worst of the anima drought, or potentially break the chains of the Jailer.
Kel'thuzad
Defeated once before by the Heroes of Azeroth, the mighty Kel'thuzad has always wanted more power.
But now that his plans are ruined he is left with but two choices. Defeat the opponents before him, or face the wrath of his new master.
(Mostly written for fun if that wasnt immediately obvious, and because this post would have taken too much space on a dedicated predictions forum)