2) Madame Gao
Daredevil has done a fantastic job of teasing out the more mystical side of the Marvel-Netflixverse with the introduction of the Hand, the supernaturally-powered clan of ninjas Matt Murdock fights in season two. Alongside the Hand, he also comes up against the enigmatic Madame Gao. Through her heroin racket, Gao is one of the most powerful people in Hell’s Kitchen .
In her last appearance in season one, Gao says that she is from somewhere “a considerable distance further” than China. This most likely refers to K’un-Zi. In the comics, K’un-Zi is ruled over by the Crane Mother, who is responsible for imbuing the Steel Serpent with his powers. The accumulated evidence has led many fans to assume that Gao will turn out to be an alter ego of the Crane Mother.
Even if that isn’t the case, it is surely a dead cert that she will appear in Iron Fist.