DC Comics have released a Sneak Preview for issue #16 of Earth-2, and amidst the ongoing plot by the Ultra-Humanite, who now controls Alan Scott's body, comes an apparent continuity conundrum. "The Weapons of Oa" comment from the Humanite - an obvious mistake from writer Dan Abnett, or is the Humanite more than he seems?
Is Alan the Sentinal over there then, and most powerful being on earth 2 ?
And is OA same as Guardians here on Earth Prime?
Have these weapons been mentioned/used before then?