Of course, Lian Yu isn’t exactly packed with villains for Oliver to choose from, but I can imagine him going so far as to recruit Deathstroke anyway under these circumstances.
I’d be content to watch Oliver, Deathstroke, and Captain Boomerang snark at each other in the wilderness for an hour or so on Wednesday night.
Prometheus has everybody Oliver loves, and that’s clearly worth temporarily burying the hatchet with the sword-happy man who killed his mom.
That said, kudos to Arrow for raising the stakes so high that it’s believable that Oliver would spring Deathstroke and Captain Boomerang of all people from ARGUS prison to join his team.