How many times, now has Batman, in canon or otherwise, punched Superman by wearing kryptonite gloves or using the kryptonite ring, hitting him with kryptonite some other way?
World's Finest is the first time, right? Mid-Sixties. (And there was more to it, but that's a fifty year old spoiler.) And, Miller's done it twice, now with DKR and DKSA.