Ah, but see, he's not actually "replacing" anything. Whathat he 's doing is just bringing in deeper insight into the characters and what they've done over the years. "Post-Crisis" loner Batman still joined the JLA, stayed with them for years, and later quit to form the Outsiders due to dissatisfaction with the League's methods. This all still holds true with IC. Only now we've been given deeper insight into some of the whys and wherefores of their behavior. Batman's brief softening of personality during his tenure in the satellite era still holds, as does his reversion to the loner personality later on. We've now got more of a reason for his shying away from the League for so long as well as his growing paranoia and the development of his "JLA Protocols" ala Tower of Babel. It all still holds and true and it all makes sense. Unlike the Spider Clone Saga.
