In the final moments of The CW's "Crisis on Infinite Earths" event, as fans were given glimpses of the newly-reborn multiverse, the first confirmation came that the Green Lantern Corps exists in the multiverse that includes The CW's DC shows. A sweeping shot of Oa, the homeworld of the Guardians of the Universe and the base of operations of the Green Lantern Corps, was one of the final shots in the series (designated as the universe that housed Earth-12). The footage itself came from the 2011 Green Lantern movie, which featured Arrow co-creators Greg Berlanti and Marc Guggenheim as credited screenwriters.