http://ew.com/tv/2017/01/15/the-defenders-mike-colter-luke-cage-iron-fist/
Sounds like Danny will be the loose cannon of the squad.And so, by the time the Defenders unite, Luke will be acting as the conciliator for the group. Im the guy, the wisdom, Colter says. If you want to make sure something works, run it up the flagpole. Its a description showrunner Marco Ramirez finds fitting. Luke is someone whos, in a very mature way, compartmentalized his life.
As the mature one, Luke will have a mentor-mentee relationship with Finn Jones Danny Rand, a.k.a. Iron Fist, a.k.a. the newest member of the Defenders lineup. Hes a young guy. Theres an exuberance that Iron Fist comes with that Luke Cage wants to temper a bit, Colter teases. It cant help but have a wisdom-versus-youth quality Danny comes out like a bull in a china shop in some ways, and I think Luke has seen the world and knows certain things. Its a cool combination thatll work out.