(If that was actual Kryptonite,Supes would have been done for,and you know I actually wouldn't put it past Batman to get Green Lantern to do this as a prank,I could see him probably watching that happen from either a camera recording from the Batcave or The Justice League Watchtower and laugh a little or just grin at this not to mention Bats actuallyhad Kryptonite on so he could just do this to spook Superman anytime he wants,with some friends like him and Hal,Who needs enemies?)