User blog comment:Thailog/Ep. 126 "Auld Acquaintance" discussion/@comment-4454131-20120421202356/@comment-5041445-20120422022542

The real Roy's arm being ripped off is a nod to the comics mini-series JUSTICE LEAGUE: CRY FOR JUSTICE--where Roy's arm gets tuned on after Prometheus (who is an evil analog of Batman) is found out after he'd been masquerading as Captain Marvel on the Watchtower. Whew...