Guys I implore you to go back and read the issues again because it turned out that metallo was trying to through Batman off his trail, which was highlighted by Clark and then batman said "I thought I was supposed to be the detective!" and Clark responded by saying "its called investigative journalism BATMAN!" I gotta say, Loeb wrote some very amusing interaction between the 2.
I actually loved Batman earth one where
. So to be honest I wouldn't mind if Corben was that hired gun but to his amusement a random thug does the job for him, which could lead to an interesting monologue about why Bruce has taken up the fight against Gotham's corrupt foundations.