I'm thinking the elderly Chinese Woman will be big characters in the Iron Fist film, with Stick appearing at some point or another.
Season 2 should deal with the ramifications of becoming a superhero while continuing the themes from the first season. Given that it's the second installment, in terms of story I'd like to see things go darker.
The first season was as much an origin story for the Kingpin as it was DD. We should see Fisk calling the shots from in jail and a frustrated Matt wondering if sparing him was the right call.
Meanwhile Matt is introduced to three challenges that test his ability to stay on the side of morality: 1. Bullseye 2. Elektra 3. The Punisher
As the police turn to a superhero- DD to help clean up the city, the crime lords turn to a mysterious super villain to even the odds. Bullseye is the tragic byproduct of the costumed arms race between thugs and the police, and this season's foil of Daredevil.
Elektra is brought in by the Tridad to help regain footing in the city. She becomes Daredevil's love interest, and ultimately something of an anti-hero.
The Punisher is going to be the Stick of this season. He's what Daredevil fears becoming, despite his admiration. The Punisher is out to kill Bullseye, and Daredevil struggles with the question of whether or not it's moral to allow someone else to kill for him. Ultimately he stops the Punisher and the two make an uneasy truce.
Ultimately Elektra dies because Bullseye allowed to live, Karen nearly OD's and her fate is uncertain, Fisk is let out from jail, Foggy blames Matt for Karen's condition, and even though he's won in the day personally he's lost it all.