It's basically just general information and a placeholder, but it is stated that Jessica Jones will be released some time this year.
Charlie Cox is playing Daredevil, Krysten Ritter is playing Jessica Jones and Mike Colter is playing Luke Cage. Iron Fist has yet to be announced.
If anything, it is at least pretty cool to see the series listed.
Daredevil: "Marvel's Daredevil" is a live action series that follows the journey of attorney Matt Murdock, who in a tragic accident was blinded as a boy but imbued with extraordinary senses. Murdock sets up practice in his old neighborhood of Hell's Kitchen, New York where he now fights against injustice as a respected lawyer by day and masked vigilante at night. Coming April 10
A.K.A. Jessica Jones: Working as a private investigator in New York's Hell's Kitchen, a troubled ex-superhero's past comes back to haunt her in the live-action series, "Marvel’s A.K.A. Jessica Jones." Coming 2015
Luke Cage: In this Marvel live-action series, a street-fighting ex-con battles crime in New York’s Hell’s Kitchen as the superhero Luke Cage. Coming soon
Iron Fist: "Marvel’s Iron Fist" follows superhero and martial arts master Danny Rand in the upcoming live-action series. Coming soon
The Defenders: "Marvel's The Defenders" brings together Daredevil, Jessica Jones, Iron Fist and Luke Cage in an epic superhero team-up in New York City. Coming soon