A tweet today from the Defenders official account confirmed that Deborah Ann Woll and Simone Missick will be part of the cast for the Defenders. Woll will reprise her role as Karen Page that she has appeared in both seasons of Daredevil and will be in the upcoming Punisher series. Missick made her debut recently as Misty Knight in the Luke Cage series.
The next Marvel / Netflix series in the line is Iron Fist starring Finn Jones, but it hasn't been announced if we'll get The Defenders or Punisher second in 2017, though all three will air within the year.
— The Defenders (@TheDefenders) October 31, 2016