Considering that Daredevil Season 1 was a critical and commercial success, it was a short time before Season 2 was green-lit. Also in the plan for many seasons of Daredevil is a Netflix-verse where Daredevil joins the Defenders. This is what we know about Daredevil Season 2 spoilers, rumors, and its release date.
Fans of Daredevil might want to rejoice as Marvel has announced that Rosario Dawson is going to return for Season 2. She will be reprising her role as Claire Temple, also known as the Night Nurse. It is not known what her role will be in Season 2, but the fact that she is on the cast list does give suspicion as to what the long term game plan will be for her.
In fact, when Dawson signed up to be in Season 2 of Daredevil, she also signed a larger exclusive TV deal which will allow her to appear in Marvel's other Netflix series. In case you don't know about this deal, Marvel is starting a darker "Netflix-verse" that will consist of four individual shows that will combine to a mini series known as Defenders. In addition to Daredevil being the first character in the super-team, the other characters who will have their own shows are AKA Jessica (coming to Netflix later this year), Luke Cage (coming in 2016), and Iron Fist (TBD).
Apart from the teaming with The Defenders, that still leaves what to do with Daredevil Season 2. There are some obvious loose ends from Daredevil Season 1 that were left deliberately untied as plotlines for Season 2. For example, it is pretty obvious that the Kingpin isn't through yet, even though he is in jail. It is possible that he might still continue his empire from prison, or find some lawyer to bail him out.
Also, Karen Page is guilty of murdering Kingpin's best friend and assistant Wesley. Considering that Wilson Fisk has been known to surrender to his darkest side when it comes to grudges, it is obvious that he is going to track down Wesley's killer. This will lead him inevitably to Karen. Considering that Karen Page dies in the Daredevil comic, it is possible that this could happen here.
However, there is a lot in the Daredevil mythos that could be explored for Season 2. SciFiNow reports that Steven DeKnight has talked about Daredevil, saying that he didn't introduce classic Daredevil characters like Elektra and Bullseye this season but they are "on the radar".
Yes, Elektra and Bullseye have been introduced to most audiences as Jennifer Garner and Colin Farrell from the 2003 Daredevil movie version, but in the comics, this story became famous and not infamous. Elektra and Daredevil had a relationship that ended in tragedy when Bullseye killed her, and it affected Matt forever.
Season 2 could introduce Elektra back into Matt's life, because it has been previously mentioned on the show that Matt dated some Greek girl in college. From there, Elektra could become involved with Nelson and Murdock, and it would be interesting to see her interact with Karen, not to mention Claire.
It would be simple for the writers to introduce a hired assassin named Bullseye, and then have him go after Daredevil because the Kingpin hired him for that. In fact, there was a sniper revealed in Season 1 who had some cards with him, and this could be Bullseye. Elektra could get involved after Bullseye guns for Daredevil, and then a tragic history would repeat itself, ending Season 2 on a very dark note of sadness.
It is pretty clear that since Daredevil has proven a hit for Netflix and Marvel. They can now move ahead with Phase Two and discuss what to do with Season 2 as well as the Netflix-verse with Jessica Jones, Luke Cage, and Iron Fist. Both comic-book fans and non-comic-book fans eagerly await what will happen. So far, there has been no word on a release date for Daredevil Season 2, but I would expect it in Winter/Spring of 2016.