NBC's Constantine (based off of the fictional character from DC Comics) was an absolutely great super/anti hero TV show that aired for one season during 2014/15. It consisted of 13 action packed 40+ minute episodes. The 13 initial episodes were meant to be only half of the first season so it was ended on a massive cliffhanger. However NBC cancelled the show leaving thousands of fans still wanting more. Matt Ryan's portrail of John Constantine was absolutely fantastic and really worked with the dark and gritty tone of the show.

Matt Ryan's Constantine guest started on another superhero show The CW's Arrow for one episode (4x05) which was the highlight of a pretty low season for the show. Matt also played Constantine on a couple episodes of DC's Legends of Tomorrow Season 3 (One of Arrow's spinoff shows) and starred in the animated Justice League Dark movie. His appearences were so successful that The CW gave him his own animated move Constantine : City of Demons and promoted him to series regular in the still ongoing DC's Legends of Tomorrow Season 4. However due to the light tone of DC's LoT and the fact that it mentioned none of the unresolved plot points from his solo show it never really fealt the same. 

I propose that Constantine is picked up for a second season, either by NBC, The CW or someone else entirely, however with the same gritty tone that it was so great for in the first place. I personally loved Constantine's first season and it is still the best show I have ever watched and even after 4 years I am still seeing people begging for a second season.

Thanks for your time and I hope we can make something happen.