Broken Base: Danny's race has been a hot-topic for some time, particularly in the idea of adapting the comics into a show, as Marvel are currently doing. Some think it doesn't matter in the slightest, while others are upset that he technically plays the Mighty Whitey trope straight.
Contested Sequel: Lets just say that fans of Immortal Iron Fist and fans of Iron Fist: the Living Weapon don't like each other and leave it at it.
Vivatma Visajit, the Hindu version of Iron Fist from issue 16 who can channel the Brahman.
The various previous and one future Iron Fists, some of whom received their own specials.
Tear Jerker: How Fat Cobra became an Immortal Weapon: Over his unnaturally long life, he sired thousands of bastard children; each with great talent and skill for combat, and each wanting blood for their abandonment. Fat Cobra spent years defending himself from sudden attacks, killing them all, until there were none left to fight.