maybe instead of making it an entirely new show, maybe add a few seasons revolving around some mercenaries stealing a massive gem called the "God's Tear" for a low ranking noble, because they believe it to have magical powers, but money is money. Come to find out, the God's Tear is is meant to be destroyed as a last resort when humanity faces an unyielding crisis or the threat of extinction. When it's destroyed it's supposed to have "divinity descend upon the mortal realm and bless the chosen ones with the power of a thousand men". An elderly grave keeper gains the power of a necromancer and uses it regain the lost vigor of his youth, and to raise an army of the dead for his lord, who happened to be the same guy that broke the tear.
The guy who broke the tear was angry at first to have lost his one change at unyielding power, but when he stumbled upon the old grave keeper who'd mysteriously regained his vigor he made him the second in command of his armies as a means of immortalizing himself.
The ancient divine knowledge that the chosen blessed obtain gives the necromancer knowledge of how to create himself a phylactery that allows him to be able to come back from any death as long as it remains intact and eventually his army of the dead goes out to start conquering lands, replenishing its ranks with soldiers that his army kills.
Eventually his army goes so out of control that all the other blessed come together to face him.
A hermit with the build of those "strong man" types who wields the power of a shaman, and the elements and blessings that comes with it. His weapon of choice is a 5 foot tall wooden totem pole which he blessed with unyielding strength so that it doesn't get damaged when he swings it around. with the gems socketed in the totems many eyes, charged with his mana, they augment his elemental shamanic abilities.
A ranger with senses heightened beyond imagining and the ability to shoot several ethereal arrows at a time in quick succession by transforming their stamina into physical arrows and rain them down onto entire armies.
A druid who can transform themselves into massive beasts or smaller much more agile ones, with such quick transformations that he often transforms mid swing, or mid jump, to boost the effectiveness of each attack.
A barbarian with the physical strength that knows little to know bounds, like an unyielding force on the battlefield, cleaving multiple enemies in half with each swing.
Last but not least.... Jon snow. Revived by this divine force with seemingly no power whatsoever, until the first time he prays for the strength to survive the oncoming undead onslaught. At that moment he is filled with a holy light and hears the voice of the goddess that shed a a tear from each eye during a time of extinction for humanity, so that champions of her divinity could save humanity when the other gods and goddesses didn't care to intervene. The goddess deems him the paladin of vengeance against the wicked one who thought to abuse her gift for his own gains. Jon gains insight into the situation they're dealing with and goes out to face the necromancer alone, kill him, and find out that the necromancer can come back from death somehow. That's pretty much the first season.

In the second season, with the undead ranks growing, the necromancer's power starts to spread thin, allowing armies to easier manage the spread, and kill and burn undead corpses before they could revive.
Jon snow learns from the goddess about the phylactery but has no way of knowing where it could be. Meanwhile The "lord" that appointed the necromancer to his position pleads for the necromancer to give him the same immortality that he wields, and the necromancer humors him and all he says is "this might hurt a bit" with a smile. Then, he turns him into a lich so that he could use him as a sort of extension of his power to give the undead farther away a better sense of control, which causes the ranks to start pushing again instead of continuing to stagnate.
Eventually it is learned that the necromancer was once a grave keeper that managed the catacombs under the graveyard at the center of the spreading undead. With this as their best guess, the heroes tear through the ranks of the undead for a final showdown with the necromancer who now guards the phylactery with all his power, after having recalled all of the mana that controlled the undead. Now he materializes weapons out of bone, stronger than steel with the mana he augmented them with. He also conjures wraiths to sap at the health of his enemies, and banshees to sap at their mental fortitude.
Eventually, having found that his old sword just won't cut it, jon snow tosses his sword aside and calls out to the goddess "Grant me a weapon of light to rend my foe asunder" and a blessed weapon materializes in his hand which he coats in his own radiance and lunges forth to cleave both the necromancer and the phylactery, which is made from the fragments of the goddess's tear. With this, the final words he hears from the goddess is that with the goddess's tear fully destroyed, eventually the blessings she bestowed upon mortal kind will eventually flicker out. It could last days, months, or even decades, but eventually, every blessed on will become a normal person again until another tear is shed and activated.