With rumors of a Marvel internal civil war between the movies and TV/comics division, which states Marvel Studios may put the kabash on the use of Iron Fist in Netflix and the Defenders, comes new rumors suggesting The Punisher may be used as a replacement.
Marvel can’t quite seem to figure out how to put Iron Fist into the equation and time is running out. They’re very pleased with how Jon Bernthal’s portrayal of Frank Castle for Season 2 of Daredevil and know that the fans have a great appreciation for the character. They also know that a Punisher series would be much cheaper and more marketable. They have a contract with Netflix and have to do something. It appears that for this phase of shows, time is running thin for Iron Fist.
It's also suggested Marvel may be having a hard time finding a lead for Iron Fist, and we can even further speculate if the rumors of Marvel Studios axing Iron Fist on TV are true that Iron Fist may be appearing in the Marvel movies (possibly on the supernatural side of things with Doctor Strange, etc).