That part doesn't count! All New All Different had nothing to it.
I clearly meant Living Weapon:
Iron Fist: The Living Weapon
After the events of the Avengers/X-Men War, Danny entered into a relationship with Brenda Swanson, a reporter who interviewed him about his family. After having sex with Brenda in the Rand Building, Danny was attacked by a cadre of undead ninjas. Moments later, a young monk named Pei stumbled into his apartment and collapsed before telling Danny to return to K'un-Lun.[60]Danny later found a portal to K'un-Lun under one of the elevators in the Rand Building. As he made his way back to K'un Lun, he found the city engulfed in flames, destroyed by a mysterious hooded figure.[61]
One of the survivors blamed him for not being there as K'un-Lun's champion to defend it from invasion. Danny later grabbed the man and angrily demanded to be taken to Lei-Kung. Another survivor lead him to the Tree of Immortality, where Danny finds the Prince of Orphans waiting for him. He warned Danny not to go near Lei-Kung, but Danny ignored his pleas and found Lei-Kung decapitated. The Prince of Orphans later offered him the choice of life or death, but Danny angrily destroyed the Tree and engaged him in combat. He later recovered and was shocked to learn that the mysterious hooded figure was his own father.[62]
Danny was forced to use the Iron Fist against his father, but this didn't stagger him and the force broke his hands. He later realized that the mysterious figure wasn't his father and that his identity is the One.[63] The undead ninjas later surrounded him, but a mysterious man arrived on a sled and pulled him to safety.[64]
Danny awoke in a cave, where he met Fooh, a monk from K'un-Lun, and his old friend Sparrow. She tells Danny to stop Davos and the One as they have declared New York City as the New K'un Lun.[65]
Sparrow and Fooh nursed Danny back to health, and Fooh used some of K'un-Lun's forbidden technologies to forge metallic fists to compensate for the loss of his chi, and sent him to confront the spirit of his mother.[66] The two of them reconciled and together with Sparrow and Fooh, the three of them went back to New York to finally confront the One.[67]
They arrived at the Rand Building, where Sparrow faced against Davos and Danny faced the One once again, but was defeated. To counter this, the dead spirit of Fooh told Danny to use the chi of the citizens of K'un-Lun, thus empowering him once again.[68] Danny again fought the One, but the One utilized the chi to break the barriers of life and death to bring Heather Rand back into the living, but something else came out.[69]
The mysterious figure was revealed to be Zhu-Kong, the God of Fire and Universal Order. Zhu-Kong tried to punish everyone within New York but the One convinced Danny to merge with him, creating a giant robot. Zhu-Kong and the merged Danny battled it out through the streets of New York. Meanwhile, Davos killed the last incarnation of Shao-Lao and Danny's chi once again was depleted. However, the One gave him his last remaining ounce of chi and Rand once again engaged in combat against Zhu-Kong and defeated him as well.[70]
It lives out the follow up Immortal Iron Fists, where Pei goes to school and Danny hunts down elemental dragons. Featured the Mother Dragon, who is giant and pink.
Gonna assume none of Living Weapon is canon, because the latest series has no sign of Pei.