A Geeky Viewpoint

SuperGirl is moving to the CW, Agent Carter has been cancelled, Marvel's Most Wanted didn't get picked up, and Agents of S.H.I.E.L.D. was picked up early as the CW renews Arrow, Flash and DC Legends of Tomorrow.

CBS
The audience for CBS skews older than any other TV station is America.   The average age of the typical viewer is a tad under 60.   CBS green light Supergirl last year in hopes of drawing a younger audience.   In a compromise Supergirl was actually a crime procedural show with a Comic Book character lead.   You know what they say about compromises?
SuperGirl actually was the most watched new Drama on TV; however its viewership numbers never came close to matching the existing dramas on CBS.   While the Audience skewed younger for SuperGirl, the older audience turned off their TVs. 
CBS renewed SuperGirl however it moved the show to its sister station the CW.   The expectations is the SuperGirl will continue to draw similar audience numbers and free up a valuable time slot on CBS for a show that more matches the demographics of its audience.

CW
Arrow, and the Flash were renewed fairly early this season leaving the question of whether or not DC Legends of Tomorrow would be renewed.     It was renewed as well about a week or two ago.   With SuperGirl transitioning from CBS to CW there are four DC Comic products on CW this coming season, too many, too early to tell.

NBC
With Heroes Reborn cancelled and little else that qualifies as Sci-Fi/Comic Book/ Fantasy on the channel not much to discuss.   At some point an in depth look at SyFy Channel's shows may be do, but this is not that time.

ABC
In a minor shock ABC cancelled Agent Carter and decided against picking up Marvel's Most Wanted, while renewing Agents of S.H.I.E.L.D. fairly early.
Agent Carter had low ratings which normally is an easy indicator on the forthcoming cancellation of TV Show; however the show had a female lead (Haley Atwell) which is unusual in its own right, but also had a female show runners (Tara Butters) which is so unusual these days that it is one of a small handful of shows that have both.   ABC has been attempting to promote itself is very diverse and suddenly the show that qualifies as being diverse is on the cutting block.   It was obviously not enough to change the shows fate.
The rumors over the past week indicated that Marvel's Most Wanted was not going to be picked up.   Initially I was caught off guard as this was a show that ABC had pushed for.  The show starring Adrianne Palicki and Nick Blood (reprising their roles form Agents of S.H.E.I.L.D.) had the two ex-spies/agents working against another global conspiracy with a slightly darker point of view that Agents of S.H.E.I.L.D. It will be interesting to hear what happened and why a promising project failed since the pilot was green lighted.

ABC still has thee additional Marvel shows in development but little is known for sure on these three projects.

On Freeform (formerly ABC Family) Cloak & Dagger is in production for a January debut.

Even though Agent Carter was cancelled by ABC yesterday it is very likely that a third (and potentially more) will be filmed and aired on a streaming service.    Netflix is rumored to have approached ABC and Marvel Studios as far back as January on taking over the show.    Season 1 of Agent Carter airs on Amazon Prime under an exclusive agreement between Amazon and Marvel.    Daredevil, Jessica Jones, and three additional Marvel TV shows air on Netflix.

It is assumed that Adrianne Palicki and Nick Blood will be returning to Agents of S.H.E.I.L.D. as both were highly like by the viewers.  

Marvel Studios
There three additional projects in production.  Hellfire Club and Legion are X-Men universe projects that will air on Fox and FX in the 2017 time frame.    Empire of the Dead is a limited edition comic being developed into a TV series by AMC.