To be fair, Babs already had a turn with a Power Ring, albeit in an Elseworlds. In JLA: Created Equal, after a virus wipes out Earth's entire male population except for Superman (but inexplicably including other male aliens like J'onn and Hawkman Katar Hol) and Lex Luthor (who was sealed up in a bunker), guess who gets to wield Kyle Rayner's ring?