7. John Constantine (DC Comics)
The first fellow DC entrant to trump Batman in the preparatory stakes is the brilliant John Constantine. Constantine is pretty much the best mortal preparatory master in DC Comics, with his skills enabling him to battle some of the most powerful demonic and supernatural forces in existence. As well as being an expert in the usage of magic (spells, rituals, incantations, the use of mystical items of power etc), Constantine is also a master-manipulator and the absolute pinnacle of contingency planning. He has beaten the First of the Fallen (a nigh omnipotent and omnipresent demon) five or six times using preparation, he's beaten Gabriel (a being of similar power) and manipulated the Presence himself with minimal prep (the Presence is essentially DC's God). The bottom line is that he's already prepared for most things to happen before he even knows he needs to be prepared (he keeps his favours and back up plans ready for whatever may arise) and he operates on a much higher scale of power than the dark knight, going up against beings of immense supernatural power from heaven and hell itself.