Marc Guggenheim recently released details on the Arrow season 4 finale which will air on May 25. The shoot will last for 11 days and wraps on April 19. John Behring is directing from a script written by Guggenheim and Wendy Mericle. Greg Berlanti is credited with developing the story.
The 23rd episode and season 4 finale of Arrow is titled "Schism" possibly hinting at a split among the members of Team Arrow. Will the team of Green Arrow, Spartan, Overwatch and Speedy split up for good? Given the recent developments, the relationship between Oliver and Diggle just might splinter beyond repair. If Arrow is headed for its own Civil War in season 5, will Green Arrow lead one side while Spartan leads the other? Given the narrative structure of the show, if such a split occurs, it's pretty much a given that Felicity will side with Diggle.