That had someone with shoot Supes with a kryptonite bullet. That works fine, if an evil Batman wants to assassinate Superman, or if Superman decides to make a big speech about how he's turning evil or whatever or is just mindlessly rampaging, then Batman decides to stop him. BUT, if one morning Superman woke up and decided he was gonna become a world conqueror or whatever and would show no mercy to his enemies, he could kill Batman before Batman could do a THING about it, and that JLoom "Superman counter" would have no chance in hell of working. Seriously, think about it. Clark shows up at the Batcave. Bats wants to know what's going on, and Supes starts to speak then in under a millisecond(thanks to his speed), he's punched straight through Batman's chest. Supes may not be a genius, but he knows how dangerous Batman is, he knows Bats has kryptonite, so taking him out would be a priority...and seriously, if I can come up with a plot like that, so can Supes. And regardless of Batman's skill, if Supes was in the same room as him(which is easily arranged even with Batman's paranoia), he could kill Batman in a about a dozen ways BEFORE BATS EVEN HAD TIME TO REACH FOR HIS UTILITY BELT.
Seriously, I like Batman way more than Superman, but if Superman went rogue himself(ie, not not under someone else's mind control/brainwashing) and retained his intelligence(ie, didn't become a completely warped laughing loon or something), Batman has no chance in hell.