The fact that comic book heroes are starting to get a lot of screen time gives comic fans an advantage of what will happen next.  In the case of Daredevil, the character is decades old, and certain things happened in Season 2 that are different from the comic, but still within the spirit of it.  Jessica Jones is a relatively new hero to the Marvel Universe, but other shows based on comic heroes include Luke Cage, Iron Fist, and The Punisher, have decades of story to develop from.  Soon, all these heroes, with the exception of The Punisher, will be combined together in a mini-series known as The Defenders, which could keep these successful series from being renewed. 

Those that saw Daredevil Season 2 remember that it introduced The Punisher, and presented the character in such a way that he will soon get his own series.  Marvel and Netflix sort of planned on this, and Jon Bernthal's performance certainly made it happen.  There was also a plotline with Elektra, and she died. 

Elektra's death was a landmark story for Daredevil, as in the comics, she was killed by a villain.  On the show, she is killed in a different manner, and it seems that the show implies that she could be back. 

Another important plot element from the comics is Karen Page.  In the comic, she learns that Matt is Daredevil, and the two become lovers.  The last scene of Daredevil Season 2 has Matt (Charlie Cox) revealing that he is Daredevil to Karen (Deborah Ann Woll).  In the comic, Karen sells Matt's identity to the Kingpin for a drug fix, and Karen eventually dies. 

Yes, Daredevil had had decades to develop these storylines, so what could happen on the show now?  Morning Ledger revealed that Season 3 could be about Matt and Karen. Well, Daredevil Season 3 might not happen if The Defenders happens.   The same applies to Jessica Jones, who ended her first season with killing her main enemy, but establishing what looks to be a successful private investigations company.

As far as Luke Cage is concerned, we will find out more about this character on September 30, 2016 introduced on Jessica Jones.  Mike Colter will play the title character taking on crime in Harlem, which will create something new for this Netflix/Marvel  universe.  Right now, the first two shows have very little in common, and Iron Fist might have even less in common.  There is even less known about Iron Fist, other than he is a superhero with mystical martial arts powers. 

The issue is what is the long-term plan of these characters, and what The Defenders can do for them.  Somehow, all of these characters have to get in the same room together, and it is going to take some big villain to do that.