If you have not watched The Defenders on Netflix then stop here: there will be SPOILERS ahead for specific things that happened during that series.
Now for those who have watched, you know that Misty Knight lost her arm to Bakuto's sword during the season finale. I believe this incident will be the catalyst that will launch the Netflix series into the greater MCU. I will add up the facts of how this event can help bring a more cohesive thread between the Netflix shows and the films.
After losing her arm, Misty ends up in a high-end hospital thanks to Danny Rand's connections. She's not sure where her life will go from here, but she knows she did the right thing and blames no one else for the loss of her arm. Considering that we were told that she would be returning for Season 2 of #LukeCage, fans are wondering how this will play out. Misty Knight lost her arm in the comics as well and received a vibranium replacement thanks to none-other-than Tony Stark. By now we should all know where vibranium comes from. We all hoped that this would also be the case in the Netflix series, and thanks to some recent photos released by Entertainment Weekly, it looks like we have our answer.
#MistyKnight can clearly be seen sporting a bionic arm next to Luke Cage. If they do continue to follow the comics, then we may be getting a mention of Tony Stark and Stark Enterprises subsidiary, AccuTech. Last mentioned in promotional material for Iron Man 2, AccuTech was known for making breakthroughs in anthropo-robotics. Considering that Tony is a genius, billionaire, playboy, philanthropist and he has relocated to New York in recent years, it would make sense for him to be involved in helping a prominent NYPD Detective regain her right arm. It also doesn't hurt that he's had up close and personal experience with the Winter Soldier's bionic limb in Captain America: Civil War.
What we still do not know is if Misty is still a member of the NYPD following the events of The Defenders. Her boss threatened that she could possibly lose her job because #TheDefenders stole a ton of C4 and blew up a building on her watch. If she is now working outside the law, like Cage, then maybe we are seeing more clues about the beginnings of the Daughters of the Dragon. In the comics, Daughters of the Dragon is a private investigation agency that Misty starts with her close friend, Colleen Wing. At this point in the Netflix series, Misty has just met Colleen, but we see them share a tender moment in the hospital. If Netflix and Marvel do develop the Daughters of the Dragon from this, then they can easily add characters to the team. Élodie Yung's Elektra Natchios and Rosario Dawson's Claire Temple are likely candidates.
The second season of Luke Cage is set to be released in 2018.