Arrow Season Finale Clip Released: Unthinkable

The CW have now officially released a longer cut of the 30-second clip aired on KTLA yesterday in California from tomorrow's season finale of Arrow. So...what has changed between the trailer for this episode, and this clip? In the trailer, the first thing Oliver says is that, even though he's been trying not to kill all year, Slade has to die. Here, he says that their war ends tonight -- without killing. What happened? Find out tomorrow at 8 p.m. ET/PT.