If Roy did kill Sara, I'll just laugh. Who knows, maybe *someone* is still giving him mirakubu in concentrated doses, but he doesn't know it (Ra's al Ghul and the Lazarus Pit).
Still think it was the League that killed her, I have a theory that in trying to prove his loyalty to the League again after leaving and going rogue, Malcolm Merlyn killed Sara and set up Ollie for the fall. This would let him and Thea (Cheshire) get back in close with the al Ghuls, where he'll later betray them for whatever purpose (Perhaps he wants immortality for himself or Thea).
My main problem with this season so far is that there isn't a clear antagonist; I want it to either be Ra's al Ghul, the Count or Merlyn. Ra's as a mastermind and Merlyn as the direct antagonist who gets the jump on everyone.
Predictions for the end of the season:
- Laurel will have been engaged in a freak accident similar to the Particle Accelerator with Barry where she'll gain her canary cry, and will be the new Black Canary
- Seeing that she will dedicate herself to being a hero, and that she understands him, Ollie and Laurel will try to make a go of things again
- Detective Lance will die somepoint in the season, further cementing Laurel as a freelance hero with nothing to lose
- Ra's will discover there is a lazarus pit hidden under Starling - which brings him directly there. As he bathes in it, he goes crazier and decides, to rid the city of it's vigilantes and corruption, it needs to be cleansed so he tries to flood the city by blowing up the pit. In the aftermath, the buildings are destroyed and the pit cleanses the soil of the ground, making it more fertile. Queen-Palmer Consolidated refurbish the city as Star City, with more of a forest-feel to it (Just like in the comics)
- Malcolm will be arrested in Ollie's Supermax, or he'll be dead. Thea will go off and try to be her own hitgirl for hire
- Roy and Thea will have already reunited previously, and Thea will be revealed pregnant in the finale with his child
- Ra's will be presumed dead at the end and Nyssa will be the new ruler of the League - more bloodthirsty than ever but with her own new code
- Waller will be set up to become more of an antagonist to the Arrow Family
- Roy will set off to find Thea, and also become his own hero - He falls out with the Arrow family for not being able to trust him after the Mirakubu and whether he'd betray them to the League to be with Thea (Potentially this would set up the Teen Titans show)
- Oliver's long lost son hinted from season 2 will make an appearance as Connor Hawke - He'll be the one to encourage Oliver that he'll always have a reason to still be Oliver Queen and not just the Arrow. Oliver will decide he can't let his precious son be involved in his crusade and so decides that he'll have to take risks with his identity regardless and will be himself. Whilst Olicity have the talk on that at the end and say that the day they become together is approaching, they agree it would be wrong to get together so suddenly and that Laurel needs someone to be with her until she regains herself again.
- Ray Palmer and Oliver will go into business together - they'll own a piece of Queen-Palmer Consolidated. Palmer leaves Star City to manage the new branches in other cities - Cue an appearance on Flash where he will become The Atom
If all that happens in say 21 episodes...This will be a great season of Arrow, like always.
though i think Oliver dodging the 3 motion senor automatic guns was a bit OTT. Roy's look of amazement as he it the RPG with an Arrow was so great to see, really looked like he never expected that to happen ever XD I love his character, in a world of heroism having a rookie around is always great fun 
