Arrow Season 5: 8 Things That Must Happen Next
3. Prometheus Has To Be Someone We Know
Arrow's season 5 theme is legacy, and we saw this week that serial killer Oliver is ultimately the reason that Prometheus exists. Ollie killed businessman Justin Claybourne, and the man under the mask is supposedly 'his son', who would be 'around 30 years old', which makes a lot of sense - but Justin Claybourne's random child is not the Big Bad of season 5. The show is preparing us for a big reveal, because surely, Justin Claybourne's unknown child is someone we're going to know.
Now, Susan Williams is obviously connected to Prometheus. Right after Ollie sees Prometheus do a cool backflip that he learned in Russia, we linger on a Russian vodka bottle at Susan's apartment. She might even be Prometheus, but she could very well by Talia al Ghul, who is confirmed to appear in Russia in this season's flashbacks, and with her obvious ties to the lazarus pit, Prometheus could well be another resurrected character.
Tommy is the obvious pick, with the Dark Archer arc coming full circle this season, but Colin Donnell is busy in Chicago, so we could be looking at someone like Shado (because the show could be doing a Dark Knight Rises and having Claybourne's son actually be a daughter). It's a stretch, but as long as it's someone that we know better than Justin Claybourne, that's fine by me.