Man, I'm so happy that I get to read these again. I missed a few of them the first time around (I planned to read them, I really did. I have them bookmarked!) but this one I distinctly remember. (This and Space Pirate Wondy. See icon.) Thanks again!
Also, there was one Elseworld that I know of where Diana got a ring, but so did Superman, Flash, and Batman. In "Batman: In Darkest Knight," Bruce Wayne gets Abin Sur's ring, and when he refuses to leave Earth, the Guardians recruit Superman, Wonder Woman, and the Flash to take him down, giving them rings. They don't actually fight Batman (he's too busy defeating Katman Tui, Tomar Re, Killowog, and Arisia at the same time), they fight Sinestro and powered-up versions of Two-Face and Catwoman.