You can be pardoned for thinking that Misty's "Knight... Wing" joke is a pun about DC Comics' Dick Grayson. That's not the case; in the comics, the Daughters of the Dragon worked under the cover of the NightWing Restoration Business.
Colleen Wing's Charged Blade
Marvel's Netflix shows are increasingly exploring ideas we've never seen in the comics before. A classic case in point is the idea of Colleen Wing as the bearer of the Iron Fist. For all that's the case, though, the dramatic scene in which Colleen charges her sword with Chi is actually something that has happened in the comics - after a fashion. There have been a handful of occasions when Danny has borrowed Colleen's blade and charged it for effect; the most notable being Immortal Iron Fist #6, where he used the sword to threaten a captive Hydra agent.
The "months later" scene name-drops an important character; Orson Randall, Danny's predecessor as Iron Fist in the comics. Randall was created by Ed Brubaker, and his favorite trick was to use his Chi through two guns. Randall played a major role in Brubaker's run, explaining the secret history of the Iron Fist to Danny and introducing him to the idea of the Seven Capital Cities of Heaven. Given Danny has headed to Asia on a quest to uncover the truth behind the Iron Fist's mythology, it's likely he'll be just as important in Iron Fist season 3.