Arrow - 'Green Arrow'

Red Arrow, Green Arrow

We open Season 4 with Oliver living in quiet retirement with Felicity, and adapting terrifyingly well to suburbia while Felicity manages Palmer Technologies from afar. Back in the rebranded Star City, however, all is not well. A gang known as the Ghosts are stockpiling weapons despite the best efforts of the now-costumed Diggle, Laurel and Thea. The leader of the Ghosts waltzes into a meeting of city leaders to tell them to let the city burn. When they refuse, all are killed except for Captain (possibly Chief or Commissioner by now) Lance, who is injured.

Thea and Laurel, against Diggle's wishes, go to Oliver and ask him to return. He is reluctant, but Felicity persuades him and he soon realises that she has been helping the team remotely for a while. They move to take down the Ghosts, but discover that their leader possesses mystical powers of some kind, and when they confront him during his attempt to blow up the new high speed rail link to Central City (by chance, my delayed watching and the reordering of the Supergirl schedule put this back to back with another train bomb in 'How Does She Do It?') he tells Oliver that his name is Damien Darhk.

Arrow Season 4 wants us to know that the gloves are off.

Faced with this threat and with unique experiences with the supernatural, Oliver decides to remain, donning a new costume provided by Cisco and calling himself the Green Arrow when he announces he will be the hero the Arrow never could be. Unfortunately, Darhk has an in on his identity, as it turns out that Lance has agreed to work with him, although despising his methods, and a flash forward to six month in the future sees Oliver talking to Barry Allen over a fresh grave and swearing to kill Darhk.

In flashback, we see Oliver being a rather crap vigilante in Coast City (home of Hal Jordan and Ferris Air) before Amanda Waller finds him and ARGUS drop him straight into an exciting new mission... on Lian Yu.

So, Arrow Season 4 offers to introduce magic to the Arrowverse and to kill someone off... probably in the run up to the season finale. Clearly there's going to be tension between Oliver and Diggle. We might see Green Lantern, and I don't know if Hawkman will immediately join Hawkgirl in Central or make an appearance in Star City first. Personally, the reappearance of the Kord brand makes me hope for Blue Beetle, and with Rip Hunter coming to Legends of Tomorrow, Booster Gold is not entirely off the table. I'm definitely expecting the Atom to return, not from the dead but from the microscopic.