YMMV / Arrow S 5 E 9 What We Leave Behind

• Ass Pull: After half a season building up the mystery of who Prometheus is, he might just be the son of a guy retconned into the Season 1 era who we've never heard of before. Possibly. ^note Though technically, if you were paying very close attention, Justin Claybourne's name was visible when Walter Steele examined The List.
• Broken Base: Laurel's return. While many are overjoyed at her return some are worried that they're being misled because she might be an illusion like when Deadshot came back in "A Matter of Trust" or she could be Black Siren escaped from the Pipeline.