Grant Morrison and Howard Porter had been making some of the most interesting superhero comics of the decade back in 1996 when they set about redefining the Justice League. Then, with Rock of Ages, they pulled out every tool in the drawer: Future JLA, a new Injustice Gang starring Luthor and Joker, amazing covers by Porter, and Darkseid
So what do you do when you write the best Justice League epic of all time? Simple, you break up the band…